Hmm. Your particular form of OCD is unfortunate in that it affects others (contrary to popular stereotype, not everyone with OCD has the compulsive cleaning form - some people with OCD are complete slobs).
If you do end up in a double, try designating one half of the room as yours and one half as your roommates. But if you can get an eval, you might be able to get a single.
Find out if your dorm will let students own personal cube fridges. That eliminates the need to share a fridge.
Also, you may indeed have Asperger's, but you might not. Be careful about self-diagnosis, and get a meeting with the specialist ASAP.