Last Sunday I had sex with my boyfriend and I forgot to take the Sunday pill. Monday I took two pills and kept taking the pill every night as usual. Today is Thursday and I'm going on a 4 day trip with my family but I left the pills at my house. I don't mind starting a new cycle because of missing 4 days but I'm REALLY WORRIED about that Sunday when I didn't take the pill. Do I have a chance to get pregnant??