Pills and Period?

So I was on Othro Tri cyclen Lo but I lost my last month of pills and I could refill my prescription until I was 75% done with the pack. Anyways I was off the pill for about a month and I just started a new pack 4 days ago. During the dead time between packs my boyfriend and I got intimate a few times unprotected and he would pull out 30 seconds before finishing just in case. OK so my thing is that I was suppose to start my period a few days ago and I haven't. But I have been getting my normal period cramps and such. Is it possible that restarting the pill couldve thrown off my cycle? Or is that a possibility of pregnancy.