hello my name is steve, i had unprotected sex with a girl of 18. after two weeks, i started having some symptoms like... headache, cough, loss of appetite, weight loss and diarrhoea, i was also diagnosed of hepatomegaly. few days later in the hospital, the doctors told me that my immune system was weak. so i was tested for h.i.v infection and i was negative. but i fear that all these symptoms are h.i.v symptoms. please do i have h.i.v?