Our hearts are breaking for Teen Mom 3 alum Mackenzie McKee. Her beloved mom Angie Douthit was diagnosed with brain cancer back in January, but things were looking better in March. Mack then revealed in May that her mother's cancer was spreading. "You don’t deserve this, none of it. So happy, so healthy, and so faithful to God. Stage four cancer in your lungs, in your brain, and now in your bones," the reality star wrote.

Now, in an emotional post, Angie described what her “new journey” with IV chemotherapy will bring. “This morning we leave at 7:30 to begin another new journey. IV chemo. I won’t have my first treatment until Monday. I have education and nutrition classes this morning then the port will be surgically placed,” the mother-of-four began. "As I’ve shared before, I dread chemo. However, God revealed to me that if I never had to go through IV chemo I would never fully understand cancer."

Angie believes that by embracing her next chapter with cancer, she will be able to help others cope. “I will now completely have full knowledge of what cancer patients are talking about. I’m also going to get to meet some incredible people while I sit in that recliner for a few hours getting my drugs!” she wrote.

View this post on Instagram

1 Peter 3:15 “…Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect,” What does one do the day before you get a chemo port put in? We made some sandwiches, grabbed Gatorade, water, and chips, picked up some grandkids, and headed to the creek. It’s the same creek my parents took me to, and the same creek I took my own kids to. To be taking the grandkids is a true blessing. We had a blast. I loved watching them catch minnows and little perch while the little guy played with the rocks. I have so much to be thankful for. It was a perfect day. This morning we leave at 7:30 to begin another new journey. IV chemo. I won’t have my first treatment until Monday. I have education and nutrition classes this morning then the port will be surgically placed. As I’ve shared before, I dread chemo. However, God revealed to me that if I never had to go through IV chemo I would never fully understand cancer. Therefore, I’d never truly be able to help others going through it. I will now completely have full knowledge of what cancer patients are talking about. I’m also going to get to meet some incredible people while I sit in that recliner for a few hours getting my drugs! I know God will protect me. He’s never let me down…ever! If you are facing something that you dread, give it all to God. Let him show you the purpose and reason for your mission. Then trust him to take care of you. Soak in every moment so you can use it to help others. Continue to smile and hug no matter how you might feel. Brighten someones day, even if your day may seem bleak. Ask a friend if they need anything. Show them love, compassion, and forgiveness. Share the love of God everywhere you go, no matter where it is. Be nice! #alwaysbekind #staystrongmightywarrior

A post shared by Angie Douthit (@angiedouthit) on

She concluded the post with some amazingly inspirational words. “Soak in every moment so you can use it to help others. Continue to smile and hug no matter how you might feel. Brighten someone's day, even if your day may seem bleak. Ask a friend if they need anything. Show them love, compassion, and forgiveness. Share the love of God everywhere you go, no matter where it is. Be nice!”

Just two months earlier, things were looking up for Angie. "It’s a good day, radiation and chemo are kicking this cancer's butt!" Angie's doctor told her during a visit. According to Angie's new scans, her brain tumors are continuing to shrink and one of the tumors in her lungs went from 7 centimeters to 2 centimeters. She also had "hundreds" of smaller tumors in her lungs, and because of the treatment, they are all now either inactive or gone completely. "I will continue on the chemo pill and will have more scans in April and May," she revealed.

Angie's daughter Mackenzie was hit pretty hard when she found out about her mom's cancer diagnosis earlier this year. "I’m devastated, I’m angry, I'm shook, I can’t breathe. You are everything. Please pray," Mackenzie wrote in the caption of a collage of photos showing her close relationship with her mom on Instagram. On Jan. 2, she revealed that her mom's sickness was worse than they originally thought. "All prayer warriors. Please pray for my mom. What we thought was bronchitis turned out to be three masses on her brain, one large one in her lung, and multiple blood clots. We are in shock and devastated. She has brain surgery tomorrow. I’m sick. I’m so sick and want to wake up," she wrote.

The news was extra shocking considering how fit and active Angie is. In November, they actually competed in a diabetes awareness run together, and her mom blew her out of the water! "Thanks, Mom, for always setting a good example of health and fitness in my life," Mackenzie gushed at the time.

Mackenzie mentioned how well her mom treats her body in an interview with Us Weekly. "She is the healthiest person I know," she said. "Eats healthier than me. Always organic. Doesn’t smoke, doesn’t drink, she is a school teacher so [she] has no money. She runs marathons and works out two to three times a day. This does not run in our family," she revealed.

Love Teen Mom? Be sure to join our Teen Mom Facebook group to chat about all the latest updates and juicy gossip!

For access to all our exclusive celebrity videos and interviews – Subscribe on YouTube!