From reading your posts it sounds like you are winding yourself up over school. Try not to think about it, just go and do it, go through the motions at school and it will get easier. It will seem super hard to go the first day but when you get through it you will feel stronger. Try not to put too much pressure on yourself and use catastophising thinking. Give it a go, if you handle it, great, if you dont, try again next semester.