Dear all if you hear from a single unprotected sex and negative after 28days. Please don't put yourself in anxiety. It is 100% conclusive. I was having all symptoms like feeling feverish, leg pain , no sleep, dry mouth. Weakness feeling. And had wasted my 2 year in thinking of hiv every time I had something I feel it's HIV. It's only matter of your mind. So please don't waste time googling. Please go tested after 28 days and forget all. Mind is so powerful thing. It can create symptoms because of anxiety. Good luck .