My period due date was 20 feb. I started with some spotting on 20/02  with some brown discharge. Did not feel like period. No period symptoms. This went on for a week after which it stopped. Had sexual intercourse after this twice and then second time noticed brown discharge again. Later started bleeding with clots like periods on 03/03 but very minimal bleeding. I usually have average bleeding during periods and it lasts for 4-5 days. Now this minimal bleeding is ongoing till today. Pads have just spotting but I can see blood while washing. Pregnancy test at the end of February was negative. Have thyroid taking synthroid 75