Too late for accommodations?
Go talk to someone at the university who has some responsibility in such matters. There is often a specialized office for it. Discuss the situation there and ask for advice. They have knowledge that few of us here have and can make suggestions few of us might think of. 

But it isn't necessarily a question of contesting results. Find out your broader options before you choose any particular one. There may be some combination of things that can be made to work for you. 

You aren't alone in such things, and universities short be adept at handling them.