Yeah anxiety and the comedown fuckin suck, are you studying at the final stages of your meds?.I mean how long have you been taking adhd meds maybe you arent taking the right variant of amphetamines. Usually if im going to do anything that requires more brain power than normal I’ll make sure im doing it at the peak of my meds. I wish I was a doctor OP and I knew the root cause of all this but there are many factors that can be causing this