I've had the Nexplanon implant for about over a year now. I've never really been as sexually active while on the birth control implant until recently. My partner ejaculated inside me and I became very paranoid and took a Plan B the next morning, about 3 days after taking the pill we had sexual intercourse again. 2 days after we had sex I felt abdominal pain and cramping and I began bleeding for the first time after inserting my implant (I stopped getting my periods and spotting altogether). Is this effect from the plan b or my birth control? Also, does taking Plan B while on Nexplanon affect my cycle on the implant whatsoever? Should there be any concern for pregnancy?