I received unprotected fellatio and protected vagina with commercial sex. after that the penis hurts and itches without discharge. i'm afraid of hiv. and an 18-day rapid hiv test and a 32-day cmia test. all negative. is my risk high?

This was a nearly zero risk exposure. HIV is not transmitted mouth to penis, and condoms are effective prevention for vaginal sex. Your penile symptoms are not HIV, which does not cause itching or penile pain. See a doctor about those symptoms if they continue. Your negative HIV tests so far are nearly 99% proof you didn't catch HIV; for 100% have another test at 6 weeks.