My period normally has around a 4 week interval between them. Normally a day less or a day more. I have a heavy flow, and major cramps when it does come. Last time me, and someone else I know, had it the entirely same time, but hers has started 3-4 days ago, but mine has not. I'm late. I've had light cramps on and off, a dampness, and get randomly feeling weird. I don't know if I'm pregnant or not. I have never been, so I wouldn't know the feeling. I have already taken a HPT and came up negative. Could I still be pregnant?