I got diagnosed with a cognitive disability and i was a child and they told my mom it affects my ability to comprehend things does that mean i have an intellectual disability?

It isn't possible to know without more information, including symptoms you are experiencing now. If you don't feel comprehending things is a problem for you, then likely all is well. Having had this childhood diagnosis, you should be reevaluated now that you're an adult. Start with your primary care physician, who might refer you to a psychologist. Good luck.