Okay so for the past 3 months now, my partner and I have been having unprotected sex and I am trying to get pregnant, but i'm still having my periods. I have some of the pregnancy symptoms and I do not understand how I can not be pregnant by now.. I have taken plent of home pregnancy tests but they also come up negative (these are cheap pregnancy tests that i have been taking). What am i supposed to think or do? I do not understand any of this at all.