Hi, my mom have been having a uncontrollable vaginal bleeding and it all started when she start taking these birth control pills and since then she have had to get a blood tranfusion from loosing so much blood and even after that she is still loosing a lot of blood so they prescribes her some provera to stop the bleeding and is helps but after the ten day supply is gone she start back bleeding. She have had an ultrasound done and they said she have fibroids. so now she is still bleeding and her blood is now black. what is going on and what can be the problem?