I'm on birth control (implanon). This is my last year. Me n my bf have sex no condom, n I'm getting scared I might be pregnant. I took a test n it came out negative but I'm still sacred. My nipples hurt, I haven't got sick but sometimes in the morning I do feel like throwing up. I still have another test I'm waiting to take, just in case. But is there any other reason my nipples could be hurting? Isn't even possible to get pregnant on implanon?