How to get motivated and disciplined with chronic illness

I (17FTM) am I constantly sick and suffering from bipolar 2. I used to be a really smart kid, As on every test, I was in the gifted program, I would clean, I would go out and do stuff. It’s my senior year, and I’m failing classes, I’ve barely applied for college, and I just can’t do anymore assignments. I’m tired of people saying to give myself some grace, cause I’ve been like this for two years and I’m tired of it. I’ve given myself too much grace. I just want to be able to have the motivation to do my school work, go to my classes, clean, and just live my life. But it’s hard to live my life, when I’m constantly sick. In the past three months, I’ve constantly had migraines, I’ve had pneumonia, the stomach flu, and my psych keeps switching up my meds. I don’t even have the motivation to take my meds anymore which makes my motivation so much worse. I just want help pushing myself. What should I do?