When did you have the depo shot? Each shot works for up to 12 to 14 weeks, but you must get the injection once every 12 weeks to get its full protection. It starts to work as birth control immediately after the first shot, if you get it within the first 5 days of your menstrual period. Otherwise it is recommended that you obstain from sexual activity for at least 5 days. Breast soreness is a side effect of the shot. When was your last period/when is your next due?
Well ways best is stop having in protected sex or like just stop completely! Rember your only 14 there's many other things u could be doing and enjoying besides having sex