Period Every 2 weeks on Implanon

Rita

Hello! I've had the Implanon for the past 3 and an half years (this is my second one, I got it replaced the last month). I didn't track my periods with the first one, but now I'm realizing that I have a period every 1 and 1/2 - 2 weeks. Does this happen to anyone else or should I seek medical care?