So I forgot to pick up my pills to start on Sunday and I missed the first four pills if the pack. I didn't start the pill til that thursday. Within a few days my boyfriend and I had sex. we did use a condom the first time that day but we didn't use a condom the second time we did that day. I was supposed to start my period 2 days ago and haven't yet. Is it normal to miss a period when you miss 4 pills in a row or should I be worried about a possible pregnancy at this point?