I can’t stop moving

Any advice for not acting like a crazy person while taking the mcat? I’m a person who has always studied best in the weirdest body positions. I tend to move a lot, probably as a comfort and coping mechanism for stress. I took my second full length exam today and it was so hard to focus on the exam and NOT move around like a damn rolly polly. I would imagine it’s frowned upon to put my knees up by my chest and go into seated fetal position frequently during the actual test ☠️ I don’t wanna act like an idiot.

How do I train myself to STOP sitting weird and talking to myself during the test?

I will note that for the rest of my full lengths up until the exam, I plan on taking them in public (which would slightly discourage me from doing this but definitely not entirely stop me)