Ok so im 17 and I had a pregnancy scare. I took the tests and they came out negative. I got the nexplanon implant in my arm its a birth control. But since im a little bit bigger its not as effective. But now my problem is Im getting headaches all the time along with nausea and back pains. Oh and when I get bruises in my sleep they can be as small as a thumb and still take forever to go away