I've had nexplanon for 13 months. From day one I've had 2 periods regularly every month. Last month I did not have my second period, and a couple weeks ago i had very little spotting like 2 spots. My period still has not come and it is way over due. Now im feeling nausea off and on and sore breasts and have disinterest in food. Could I be pregnant? Also ive never had any of these symptoms before while on this bc