I had sex at the end of march(no condom broke, but maybe some precm got inside...). After i had an urinal infection and massive pain. I had 2 periods right on time, lasted 5days each, since then, but now im late 2 days. I had 2negative test and same with hcg(below 0.1). I experiences some nausea in the morning, but that is all. Can i still be pregnant?