Nexplanon Implant

I will have had the nexplanon implant for a year this August after 5 months of no period then a period every two months I thought my body had finally regulated to it. Until this morning I started bleeding again a week after my last “period”. Is this normal?? I’m having cramps and all the typical symptoms.

I’ve also been working out like crazy, heavy cardio and lifting and after a heavy arm day it feels like I can almost “feel” the implant, maybe it’s all just in my head. Anybody else had this??