please some information...:)

i was wondering if anyone could answer some of my questions,  i am suffering from OCD... n i have a fear of well everything that i think could give me a disease, my day can be very frustrating... i check everything to see if there blood, i wash my hands like 30 times a day.. i wont share drinks, not even really with my family, n well im driving my husband up the wall, i have been tested for HIV 4 times, all neg. n hep c again neg. i will get tested even when im not at risk... so now that i have been tested for everything.. i have hooked myself on to hep A... i went to Dominican in 2005 for after prom... i got the Twinrex shot like a month or so before i left i think... i didnt get sick when i was there, or when i got back... but i also used to work in a day care for a couple months, but had to stop coz i was going crazy thinking i was going to get something, we did have a out break of diarrhea, n vomiting... all of us got sick.. including parents.. i got it.. but it only last a day or two.. then i felt fine, n havent been sick since... im rarely sick.. so i would know if i was right...
i would really love someones help please
Thanks