This is heartbreaking.

Selena Gomez's rehab stay has been anything but a positive experience for the 24-year-old, who recently checked into the Brookhaven Retreat in Tenn., citing personal issues as her reason.

And now, the singer's friends and family have become seriously concerned.

MORE: Justin Bieber's Relationship With Sofia Richie Pushed Selena Gomez Over the Edge

"Everyone is worried,” a source tells In Touch exclusively. “Selena keeps saying she feels like hell and wants to leave the facility or go switch to outpatient treatment."

But leaving the all-women's facility doesn't seem like a feasible option at this point due to her anxiety and depression — and a source previously confirmed that Sel is expected to stay for "a few months."

“If anyone knew how bad she was, they’d be in shock.”

For more on Selena, pick up the latest issue of In Touch, on newsstands now!

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