Intellectual disability or am I just really slow ://

I’m autistic and I struggle a lot with learning, I don’t know how to describe this perfectly but it fees like my brain freezes and lags when I’m trying to learn something and I tend to be slow to understanding something until I heavily reflect on it from every angle and I feel like this just isn’t normal? I experience heavy anxiety in anticipation of learning and demonstrating something new to the point where I skip a lot of school out of fear, or my heart hurts and I panic. I feel like my brain doesn’t digest properly, like there’s a forcefield stopping me from truly grasping to the full extent. I don’t know if I qualify for an intellectual disability because my grades are good (except math, I have dyscalculia) and I’m well articulated so I was wondering if these are symptoms of a learning disability or general slowness. I don’t think i’m stupid my brain just doesn’t cooperate