Natural ways to stop bleeding from Depo Provera shot?

[MrsLevell2Be]

I recently got my first shot of Depo Provera on April 29, 2013 to help my Endometriosis pain. On May 16th I started breakthrough bleeding after a trans vaginal ultra sound. It has since increased to heavy bleeding with clots and today is day 20. Is there a natural way to stop the bleeding instead of taking synthetic estrogen pills for 7 days? I am trying to avoid more synthetic hormones.

Could black/blue cohosh or vitex/chasteberry help? I am not trying to prevent pregnancy so I am not worried about my birth control becoming ineffective.

Please help!