I've been on nexplanon for about 4 months. Got it February 6, 2015. I was spotting everyday until a couple weeks ago. I haven't had any spotting or a period. My boyfriend and I had sex at like the begging of last week and now my breasts are a little sore and yesterday and today my stomach as been feeling a little weird. Could I be pregnant or is it possibly just side effects? I may just be freaking myself out but any answers would help! Thanks!