I think it would also be prudent to get your thyroid checked right away. That temperature is VERY low.
Follow Matt’s advice for recovery- eating frequently- Salt, sugar, saturated fat, and sleep. Cut back on the exercise significantly, and do some form of stress relief daily. Watch your temps to see if they improve with these changes.
I know that the body image issue can make it hard to for you to stop the exercise and start eating more- but we’re talking about you health right now. It’s up to you to take care of yourself… Good luck!