School issues

So I'm 16 and it's already been a few weeks of school and I've only made it there about half of the days, I've had nightmares for years but a few years ago they started getting worse when I started remembering more of my trauma due to my abuser coming back into my life, we moved in the summer thank God but I still can't sleep I still have nightmares, most of them aren't memories themself but specifically trigger memories or feeling that end up triggering me. I missed all of last year because I couldn't be around him and even do school at the same time, I've tried to talk to my parents multiple times but they have never taken me seriously we actually moved for other reasons. my parents may sound lenient but I assure you every single day that I missed they would get very angry with me triggering me half of the time. before people even start yes I've tried going to bed early yes I don't use my phone before bed yes I've tried reading yes I've tried melatonin it makes it worse I've tried breathing exercises ived tried meditation I've even tried that tapping thing. I've tried so many damn things but none of them work. on days when I'm not at school I got into the habit of "sleeping" through half of the day, it was actually me just laying there because I was tired because I'm either awake or asleep and if I'm asleep and I'm not having a nightmare it's either a miracle or it will turn sour shortly. my mom wants me to take even more supplement that I've taken for years that don't do a thing because I think it's me. I tell doctors I don't get lots of sleep I tell them I have nightmares I tell them I cannot function I tell them how little sleep I get and they don't ever do much, I used to have a therapist, I tried to get one here but the nicest way to explain how bad of a fit she was is that she was complaining about not having my mom in the room with us after 3 minutes even after I tried to explain some other unrelated stuff (she kept cutting me off too ect) so yeah super long dumb rant I just don't know how to function at school.(also too tired to edit sorry ik it's probally pretty bad)