I have been on birth control for about a year and I have used a condom every time. This time my fiance and I had unprotected sex for 10 or 15 minutes (not long at all) before we both decided it might not be a good idea. This was also the day I had my period (later on). What are the chances of me becoming pregnant? (I have 7 days to go before I am on my inactive pills, when I get my period). I have been feeling a little tight in my breasts but I believe that is from moving heavy boxes. I also feel some small cramps in my stomach but that could also be from lifting heavy items. Also my other question is, is it really okay to have sex without a condom when you are on birth control?? Thank you :-D