I would really like to know. I usually have my period for 5 days, But this time I went on bleeding for 8 days. The 7th and 8th day tho was light, But come and go. I finally decided it wasn't normal for me to be bleeding that long. I went to the e.r the Dr. Did some testing and prescribed me provera to take for 7 days. Now I'm on my second day and I'm praying to God it works!