I got the nexplanon implant the second day of my period. My doctor told me to wait a week. However I thought she meant exactly one week. So the seventh night I had sex and he came in me. I've now had the implant for two weeks and have had lots of sex and he has come inside of me each time. I'm so scared that I could be pregnant. I've been reading all these things saying with the Implant you need to wait longer... Should I even worry?? We are both STD free.