Hello. i am on a combination birth control pill. i took my pill and then about 10-20mins later had two to three bouts of watery diarrhea (a decent amount of watery stools for each bout) is taking another pill necessary?

Birth control pills: Birth control pills don't usually cause diarrhea. This is more likely due to a stomach virus. In any case, you should not have to repeat the dose as the pill would still be inside, Vomiting is another story, but if someone vomited more than 30 minutes after taking the pill I would not recommend taking another as it is likely absorbed already.