Bleeding after sex (4 months postpartum)

Hi ladies!

Like the title suggests, everytime my fiance and I have sex I have light to sometimes moderate bleeding afterwards, sometimes for a few days. I had my first baby via c-section and was medically cleared at my 6 week post partum checkup and no complications.

Is this normal? At first I thought it could be spotting from my birth control (I have the implant in my arm since 8 weeks post partum) but I've figured out it's always after sex. Should I be concerned? Putting in a call to my Dr. tomorrow just to be safe.