Period or spotting?

Marissa

I had a D&C on 1/16 and have been spotting ever since. The spotting has been very light and a brown color. On 2/25 I had a heavier amount of red blood so I thought it was my period. It only lasted a few hours and now I’m back to spotting again and it’s brown again. I’m trying to figure out if that was my period or some missed tissue passing?