Norethindrone
"I have used other birth control in the past that has regulated my periods like clockwork after one month of use.  I have been diagnosed with high blood pressure and was told this was one of the only pills that did not have a side effect of higher BP.  I gave it 4 consistent months and after I have experienced epic bleeding, to the point it was like having 2 periods back to back, I decided it wasn't for me."