I feel unsafe, what can I do?

I am 17 years old, I'm 5"5 and I weigh 94 pounds (and that's during my period, so I assume I'm slightly lighter?)

I have informed my therapist who I was seeing for OCD and anxiety about my eating issues. I am currently only eating under 300 calories a day, I'm over exercising and as much as I would love to eat more I dread the scales the next morning. I am constantly crying and looking at food and calories. I next see my therapist on Monday, but I feel extremely unsafe and emotional. I have to work weekends and I'm currently at college full time and this is proventing me from having the energy to walk to college. I'm experiencing chest pains and when I walk I feel extremely dizzy. I've been to the doctors and I'm currently waiting to have a blood test.

I have no idea what else to do, today I have only eaten 85 calories and I feel unsafe and unstable. Do I need to go into hospital? I can't possibly bring myself to eat more, it's so distressing...