For the past 4-5 days I've been experiencing really sore nipples, not so much the actual breast but more specifically my nipples. They stay hard and they seem to be swollen, I've also had a lot lower back pain and stomach aches, such as cramps and heart burn. I the implanon implant as a form of birth control and and my fiancé and I use other protection maybe 1 once for every two times, so about half the time. I'm just curious if I am pregnant and what I should do about the control and the effects it may or may not have on the baby.