I hate my body so much

I’m the fattest i’ve ever been. I’m nearing 300 pounds and everything just feels so out of control. I’ve been trying everything I can to get my weight under control for years but it just keeps steadily rising. I have a normal healthy diet and I exercise regularly but nothing has changed. I’ve been on anti psychotics for 3 years now and I was diagnosed with PCOS 2 years ago, which i’m sure is making things harder but it’s not an excuse. Everything just feels so impossible and unmanageable. I used to love clothes and fashion, now I can barely look at myself in the mirror. Every time I leave my apartment I feel horrible and ugly. I feel so unlovable and disgusting. I don’t know what to do anymore.