My period is over two weeks late. I've never had sexual inter course before, but a couple of times my partner did ejaculate on my thigh. i took two pregnancy tests(on two different days-1 in the afternoon one first time thing in the morning) just in case. Both came negative. The first was a bit confusing as hell the second line was slightly pink. But the second test was a proper negative. I still haven't gotten my period and I'm worried cause I've read about false negatives and all. How can I know for sure what's wrong and accordingly deal with it as soon as possible