Kind of freaking out... Has anyone become pregnant while on the pill??

Yesterday I was have dull pains in my pelvic area but it is no time for my period. I started a new pack of B.C. Monday and my period ended last Tuesday... Well I've had such a hectic week planning my daughters second b.day (which was a success) .. I forgot to take a pill so the next morning I took two. Well , I had unprotected sex yesterday and I wasn't thinking to look at my period tracker app and I'm pretty sure my pains were ovulation pains... When I went to take my pill this morning I noticed I forgot yesterdays!!!!! So I had to double them again today.... My daughter just turned two Friday so I'm hoping I do not end up pregnant again. I do want more children but I really want to enjoy just her for a little longer.