I am pretty sure that i have some sort of intellectual disability.
Do you think you have lived your entire life with this disability?
Yea. This may be why my father discouraged me from taking that IQ test.
Just because you weren't allowed to take an IQ test when you were younger does not mean that you have a disability and it sounds to me like you're diagnosing yourself, which is wrong. You should go see a mental health doctor if you truly believe that there's something wrong with your brain, because it shouldn't be taken lightly if you actually do.
Well I don't want him to make a huge deal out of it so I'll probably just ignore it.
Well it could be interesting to find out what your IQ is if you want to. Either way, you have the right to do whatever you want when you are an adult as long as it is legal. Self diagnosing yourself is a great way to find out different ways to help yourself!