How am I supposed to succeed with this disorder?

I’m sorry to ruin the mood but I need some advice and help. I’m in my second year of university and I’m struggling so hard, I’m barely passing my classes (and I’m only taking 3) because I’ve been in some sort of paralysis for weeks. Everything feels so much harder, I used to be the kid who passed with honours and now I can’t even write an essay without spiraling. All my brain does is call me a failure and slow and I can’t focus on anything and I feel like no one understands.

I was diagnosed with adhd when I was 18, I’m 20 now and I just recently learned that learning disabilities are super common with adhd and now I don’t know what to do. I want to be good at school and I want to succeed but it feels like my brain won’t let me and it’s so hard.

I’m sorry for dumping all this here I just, I don’t know who to talk to about this