What Could Be The Reason For Spottings Instead Of Period After Tubaligation?

I am 39 year old african american woman with 3 kids youngest is twelve. Have had a tubaligation 6 months after my youngest. I was suppose to come on my period around the 20th of the month but instead it was a few days late and it was only light brown flakes I saw after going to the bathroom in the toilet. Nothing would be in my clothes but only in the toilet and wiping with toilet paper. Then a few days ago it seemed to be a little more and a little more red in color. Now its January 3rd and I am still spotting. This is not normal for me. I recently lost my job in August and have lost a little weight since last month because I am eating less, I currently am waiting to see if I get approved for Medicaid.