Why Do I Have Sticky Brown Vaginal Discharge, Slight Cramping And Vaginal Pain When I Am Not Sexually Active?

I had my tubes tied and a scraping of my lining done 9 months ago. I haven’t been sexually active in 3 yrs. I’m noticing a pain in my vagina like a tampon is stuck and I have a slimy brown discharge all of a sudden. I’m cramping slightly. What could this mean? Pregnancy is obviously not the problem.