I have had my implant in for around a year and a half and my periods stopped completely as soon as the implant was put in. I have no record of when my periods should be so I have no indication of finding out if I'm pregnant that way. I've never had problems with it before and have had unprotected sex several times since it was put in, I've heard the implant is very successful but I have a feeling I may be pregnant. Is this possible?