I used to choose one thing to do (and I had a rule to go to work/school) even if it was just go to the corner store and buy some small thing...it "proves" you are still functioning, and usually there is a sense of accomplishment that helps a bit.
Medication, in the end, after years...did help me but I still need other coping skills (like a task to do, using things that calm me a bit---dancing, if it is good weather jumping into the river, lake, or ocean always helps me...camping too...it could be something totally different for you....) ((((((hug))))))) I am so sorry...now that I am much older, I feel badly for my young self....a piece of me was cut short by anxiety/dissociationetc...
But, well, the kids I never thought I would have are wonderful healthy adults and the grandson is a kick so it wasn't all bad...and I managed to work full time most of my life in spite of sometimes feeling like I was just a floating torso---the thing for me was needing to function, and realizing that others didn't see what I felt.
Sometimes it was misinterpreted as unfriendly (eg: I was threatened with expulsion from a dorm for not being sociable...I had one supporter...and I walked out on the meeting I was summoned to---by the end of the semester I was told I was "OK"....I didn't change but they came to see it had nothing to do with them...)
and life goes on....
Get as much help as you can and need---it wasn't available for me and then when it was I waited too long and did too little in many ways...