pregnant??

So my boyfriend and I had some sexual intercourse about four days before my period. After every time we have sex, he always fills the condom up with water just to make me feel more comfortable and not worried that some of his sperm came out. When he filled it up, he squeezed it and a little spray of water came out from the side. Very tiny hole, and he always pulls out anyway. Just to be cautious, we bought a plan B, and I took it at about 10 pm the next day. I'm 2 days late on my period. I know that the pill may delay/mess up your period cycle, but should I be worried? I'm still getting cramps, they get worse every day but I still haven't started yet. Is there a chance that Im pregnant?