Withdrawal bleeding?

I got my nexplanon taken out on the 14th. My period was due on the 17th and it came on time just  heavier than usual. So it stopped on the 20th. I keep spotting on and off tho. Not enough to fill a tampon. I'm due to ovulate on the 29th but maybe I won't. Idk I'm so confused. I've always gotten a period with nexplanon I never spotted in between my periods tho. So is this withdrawal bleeding or just a longer period?