My boyfriend and I had sex Monday April 23rd. The condom slipped off. I don't think any thing got in there but there is always that possiblity. I am on the pill but I just got done taking a round of steroids and antibiotics. So we used a condom as backup. It slipped off. So I took next choice about 30mins. To an hour later, then the second pill 12 hours later as directed. I have had some breast tenderness and cramps like I am soon going to start my period. But still no period. It is now Thursday April 26th. I started the sugar pills in my birth control pack Sunday. I am however very irregular and I have been my whole adult life. Which is why my gynecologist put me on the pill. But I am still irregular for the most part. I am just wondering since I still haven't started should I be worried?