Periods

So I got the Nexplanon implant about a year ago now and I started having two periods a month. One that was right on track with my cycle and then another right around the time I was ovulating. At first I thought I was just spotting but it was heavier than spotting and I had cramps, all the typical symptoms I have with my period. This went on for a few months but then everything went back to normal- cycle was on track and everything was fine but that only lasted 5 months. I had my regular scheduled period around Valentine’s Day- ovulating in four days but yesterday I started bleeding and cramping again. Has anyone else experienced this??