First period on the implant

I got the arm implant a little over a month ago and I just got my period for the first time in a long time, bc of pcos. That being said is it normal for it to be this long? Started on the 6th (today is the 10th day). My periods before where usually 3-4 days 5 at the most, but now it’s at 10 days and it’s not light.