Im suffering with OCD for last 10 years.

Sir im Raja Gopal suffering with OCD. Predominantly fearing of fobhia of HIV. Example if any wound /blood see on any persons hand  who may be my friend or any person (at shops or hotels) whom I have to associate, my self fearing that, if I touch places where they have touched or if I shake hand them, HIV may transmit. Further myself very much afraid to to go to hospital bcz different type of patients use to visit, hence if I touch/seat at reception HIV may transmit, immediately after comming from hospital I use to have complete bath reluctant to seat any place in my flat. Even reluctant to touch doctor prescription that blood might have touch that, it may leads to HIV. After getting information form different sources, I understood that none of above reason leads to transmission of HIV, but my mind not accepting that fact until unless I use handeash(dettol) or sanitizer. Please help me out to come out of that bcz my life became so measurable.