Are you paying for college? If so, then get the most out of the money your spending. If not, then get the most out of the money that someone else is spending for you to go to college. If you have a learning disability, ask for help. College is one of the best places to do that. If there is an education department at your school, go there and find out if there are any programs to help you. If anything, there is probably a student there who would help mentor you so they themselves could get some practical experience.
Ask one of your classmates to see if they will help you. I suggest asking any of the people who actually speak up in class. The ones that do not say anything generally don't care.
You need to get over your fear of asking for help when you need it.
And yes, go see your professor or instructor. Unfortunately, I can't say all professors have the temperament to work with people who have a learning disability. I've worked with three college students with learning disabilities in the past when I was going to college, all of whom had differing forms of dyslexia. I found it to be a good learning experience myself and the extra time spent studying also helped me in the classes too.