What Causes Headache After Two Weeks Of Unprotected Sex?

Hi, my name is R,.,ard from Ghana. I had unprotected sex with a girl . After two weeks I started to feel weak and now I have started to get headaches almost every day, I feel in my brain. The pain comes and goes away for about a minute and come back again. I have never experienced this kind of headache in my life though it not too painful but its not going away for about a week now. I'm scared to take a test . Please help me