So I’ve been feeling down lately

So, I’ve been feeling super down lately and just at lack of everything really. Despite a loving boyfriend and a new relationship that I’m loving, I still feel so ill and drained, my chest feels constantly tight and I always find myself deep sighing because I feel like I’m just not getting much oxygen anymore. My anxiety has peaked like super bad. I’m pretty sure I must have some sort of chemical imbalance or bipolar because I was so motivated just a few days ago, and now I just find myself at a slump almost. I just feel like everything is effort and whenever I drink or eat I just feel ill. My mind just feels super fuzzy and everything around me feels like it’s fabricated or just not right. If I look in the mirror too long my face looks super weird to me and if I look at anyone else’s face for too long too, even if it’s someone I love and I have loved for a long time, it just morphs into some sort of stranger. I wish I could say all this to someone irl like my parents or my school nurse but I don’t feel like I can actually say what I’m truly feeling anymore, and I feel like whatever comes out of my mouth sounds super exaggerated or something. I don’t know what to do, and I wonder if anyone could help? I’ve talked to nurses and the school, but it all feels so patronising and just generic, and I don’t feel like I can ever really shake all these feelings.