Clots

Okay so im currently on the Nexplanon. I got it in April. Didn't get a period until June. 10/15 I started another period. It lasted from 10/15 until 10/27. It was pretty light for the most part, ended up getting the doctor to send in something to stop the bleeding which worked until about two days ago when I started to spot with some clots and cramping. Well tonight I wiped and the clot was grey, black and brown and odd looking I'm going to post a picture. Has anyone had clots like this.