I recently got off of the Implanon birth control in the month of February. My menstrual cycle isn t as stable as before. My last period was April 1st to April 5th. Due to menstrual calendars it says that I am 3 days late. My partner and I are trying for a baby. About 4 days ago I took a pregnancy test, but the result was negative. I have had pregnancy symptoms such as frequent urination, sore nipples, nauseas, and seafood smells make my stomach cringe. Does anyone know what could possibly be going on? HELP PLEASE