Postpartum bleeding

So im 4 1/2 months pp and i was exclusively breast feeding for 4 months until my supply decreased and decreased till i no longer produced. I then began bleeding and have been continuously bleeding since January 6th it’s February 13th. I have the implant birth control.

Doctor said to wait it out should i be concerned or trust waiting.

Any advice help or if anyone has a similar experience what did you do?