Hi, I am 16 and recently started getting intimate. I had unprotected sex with my boyfriend, but he pulled out. I know you can't rely on that to not get pregnant, so I was really worried. My period is currently 7 days late and I have had some slight cramping in the abdominal area (as though my period was coming on) and I've been eating lots more, I'm tired a lot and I also seem to have a creamy white discharge. I did a pregnancy test 2 days ago and it came back negative. I've recently just started college and my exercise has increased since I walk a lot there and back. The increase in exercise could also explain why I'm tired a lot and why I'm eating more, but I don't understand why my period hasn't came? I have quite regular periods and I've only ever been late by 2 or 3 days. What could be the problem? Is there a chance I might be pregnant?