I just started taking the 4 periods-a-year pill and the doctor said to wait a couple weeks to let my body get used to the hormones. well my boyfriend and i had unprotected sex and he didn't pull out completely in time (this was the method we have been using for a while now). this was on tuesday and i had been taking the pills everyday (including that day) for 8 days. is there a chance that the pill wouldn't be effective yet? im worried because today my breasts feel tender and are much larger. any help would be much appreciated!