Coming off bc ??? Help

In the beginning of September I found out I got a big blood clot from my bc. I was taken off and put on a blood thinner. September my period lasted for 9 days and with heavy bleeding. October was 6 days with heavy bleeding. November with 4 days and heavy bleeding for one day then managable. Now is December and it's a lot lighter then how it usually is. I'm still on blood thinners. What do you think is going on? Is my body adjusting and this is what I'm getting? On bc I had 4 day periods with regular tampons. Before bc I had very heavy periods that lasted 6 days.