LIGHT BROWN DISCHARGE.??!

So, I had my nexplanon removed three weeks ago. I was on my period when I got it removed, and it was like dried up blood. After I got it removed my periods went back to normal, I was still on my period for another week after the removal but it was a normal flow. When I finally got off of it, my discharge had been normal. Nothing to worry about. Then today it was a light brown, like normal discharge but a light brown color. Can anyone help me please??? Is this normal or do I need to go to the doctor.??? Also, I haven't been sexually active in 8 months.