What Causes Hot Flashes And Flu Like Symptoms After Unprotected Sex?

Hello doctor. I am been involved in unprotected sex. My last doubtful case was in Feb 2014.I don t remember any symptoms then. But now there is grooves and vertical line in my nails. Kind of hot flashes. Normal flu I be experienced. Where body temperature would go under normal. I and my partner got involved once into unprotected sex. No major symptoms buy he got tested after 4 months which was tested negative. I got tested after 8 months which too was tested non reactive from Dr lals path lab. He again got tested after 1year I month. Tested negative. We still have same nail condition. Do I need to worry? Do I need to get tested again? Can I rely on the Dr pals path lab test results? Kindly reply soon.