Just months after canceling her tour, Selena Gomez is back in rehab, citing personal issues as her reason.

And now, In Touch has new details on her latest stint — and while things seem to be improving, she hit rock bottom before she finally sought treatment.

“If anyone knew how bad she was, they’d be in shock,” a source exclusively tells the magazine.

Click through the slideshow for more on Sel’s latest attempt to get help.