I have had the implant for over 2 and a half years and not once have I ever gotten a period apart from when I got it inserted. Recently, I was away and felt slight pain in my lower abdomen and dizziness. I had sex and there was blood everywhere, then I bleed on and off for two or three days. I thought it was a light period that went away but then everyday for a week since, I have bled if I've had sex but not otherwise. Is this common when getting to the end of the implant duration or should I be highly concerned?