I think im having a mental breakdown/mental health crisis

So I (15F) have never had very great mental health, I've been on medications for depression, adhd and (not a mental disorder) PCOS for a few months. I dont know whats going on recently, im more moody and upset, I can't sleep for longer then 5 hours, im slightly paranoid, and I've been withdrawing from my friends and family and just rotting away in my room. I don't even really do anything all day, I just lie here on my phone. I don't know what's going on with me or how to fix it, im supposed to me ok by now but I'm not. Every time I try to hand put with people I keep thinking that nobody likes me and they're all uncomfortable talking to me, plus my sisters keep ditching me constantly and leaving me alone. Ive started hurting myself (not in the form of cutting so im technecally clean from sh) but ive started beating my arm with a hanger until it turns red and sometimes bruises. i do fantasize about suicide sometimes, imagining how id do it and what my body would look like, its creepy and i sound like a fucking edge lord saying that. I hate to be alone but I hate being around people, so I'm just constantly unhappy ​with everything and I just feel numb​ in a way (ik that sounds cringe). I haven't spoken to my therapist in a bit bc my next appointment is in July, idk. I just want to be better again. I barely shower, I haven't even seen my hair in a week bc I had it in a ponytail so nobody could see​ it was extremely greasy. my eating has become gross, I've been eating a shit ton lately even though I've been working to try and lose weight. Idk. My sisters and family have even pointed out I'm moody lately, my mom thinks im on drugs (im not, especially after my mom had my family watch requiem of a dream), and my parents blame my sleep schedule which I've tried to fix. Please give me some advice, I don't know whats going on with me and what's wrong.

edit: this might sound jumbled bc it's 2am and I'm tired but can't go back to sleep, I phrased it the best I can.