Hello, Doctor. I have protected sex with prostitute 4 months ago. This is my first experience of sex in 30 years. After sex I felt guilty and anxiety and frightening might contact with hiv. I kept thinking until I can't sleep well (Insomia). Suddenly I get back pain and neck pain in two weeks after sex. My whole body started feeling burns and tingling, also numbs. I went to clinic to test hiv test after 1 month. Came out negative. Then I took health care product second months , which detoxified the bodies toxic problem especially inside the nerve (Atherosclerosis). after two months it came out heat rashes especially on my chest, shoulders, elbow (papules). In third months I started to loss weight. Now I'm really confused, whether which of the causing the heat rash and weight loss? Please help me Doctor.