I can't make them understand!

I can't seem to make my professors, and even friends and family, understand how challenging some tasks are for me. I'm in school to become a special education teacher, so all of my professors, and most of my peers, are in the education field, yet they seem to be clueless when comes to understanding learning disabilities.

I have a reading & writing ld, ADHD, and OCPD (extreme perfectionism). I struggle with reading or writing anything, but I feel like nobody truly understands how difficult it is for me to get through my assignments. The truth is, and please forgive me if this comes off as vain, but my finished product is usually quite good. I also have no trouble in holding a conversation with a room full of professors discussing Education matters, so my professors (and even friends and family) tend to think that my assignments come easy to me. Honestly, a huge factor in my success is due to my perfectionism and the passion that I have for the field of teaching and special education.

A recent homework assignment, for therapy, had me detailing every minute of my day. It was through this activity that I realized just how long it took me to read a chapter; roughly 2 1/2 pages an hour, so after 16 1/2 cummulative hours I had finally finished reading chapter 4, although I hadn't even started the assignment tied to the chapter. I've tried talking to my professors, but it's like they just can't comprehend that someone could actually take that long, especially since I come off as so "gifted." I should note that I have audio books for this class, but they are proving ineffective in helping me through the particular textbook-linked assignments due for this class. I've also managed to luck out when it has come to all my previous classes (I'm a senior now), as I've either been knowledgable enough in the material or haven't had textbook-linked assignments that would force me to actually have to read the textbooks.

How do I get them to understand? I'm not wanting to get out of my assignments, but I do want to come up with a plan that will allow me to be successful, while still completing all necessary work.