hi there. I've been suffering from on and off itchy rashes from different parts of my body(thigh,neck, ears,abdomen,back,hands) with muscle pain,bone and joint pains for almost a year now...had an HIV test done 6 months after my possible exposure to semen inside my mouth out of performing oral sex. My results came out negative. I dont know what other test should i let my doctor do to me. I pretty much did all tests possible to find out whats really happening to me. Is this some form of allergy that affects my muscles and joints?