I'm in the hospital. I took an anti-bleeding medication for 7 days and…

I'm in the hospital. I took an anti-bleeding medication for 7 days and it's done. They canceled it. A day later, in the morning, it started again with brown and black discharge((((. They told me to take another pill. How often does this happen? Can you stop taking blood clotting pills? How long do people take them? Also, is Progestasert vaginal insert absorbed properly during menstrual flow?