Anxiety is ruining me

So I just got back to school from winter break,I didn’t have that much of severe anxiety before winter break but since all the teachers rearange where everyone sits after a semester break,I sometimes get seated in the worst spots,and oh boy in almost every class I’m right near the teachers desk which is awful,but the worst of all is my ela teachers room,I’m right near his desk and every time I’m in there I feel lightheaded and have one of those “silent panic attacks” he’s rude,but something is so off about him,usually when I see someone rude I don’t care and just ignore them but,I can’t with him for some reason,I avoid looking or talking to him at all costs,sometimes my hands shake it’s so severe,all he sees me as is “stupid and vulnerable” and nothing else,can some PLEASE help me out.