2 periods a week apart????

Ca

Hey everyone I’m on the Nexplanon implant! I’m super worried because I just started regularly having a period every other month on the 16th with every PMS imaginable well this month I had one on the 2nd (with pms) and now I’m worried because i just started a light period on the 16th without any kind of pms but it’s my normal start date. Can someone please help me understand what’s going on???