How do I adjust to 9th grade?

When I first started 9th grade, I absolutely overworked myself since my mom was killing me with taunts. ("9th grade is hard", "Sindh board is this", "you won't be able to do it") I gave it my all, now it's been a few months and I absolutely feel nothing. I try to study (a lot of methods) but I cannot absorb information, I randomly get these negative thoughts, or break out in a sob. I try my best but everything feels so dull, boards are getting closer and I'm genuinely starting to think I burnt out. I forgot everything I studied, I can't absorb new information. I'm cooked, aren't I? What do I even do anymore.