I'm 18 and Ive been on Implanon for almost the full three years, September will make it the end of the three years. I haven't had my period the whole time nor any other problems until now. Ive been very stressed and It was two weeks ago when I last had unprotected sex with my boyfriend and this week I have been having some problems that concern me to think i'm >pregnant. I very tired and often need to sit, light headed to as though I feel I need to catch my breath, pee every 10 min, certain tastes and smells that usually don't bother me but now do such as garlic make me want to throw up , I'm nauseous all the time and gag. Also getting horrible cramps. tonight I took two digital test and got negative so idk whats wrong..