Periods after Mirena

My periods have been so irregular and heavy and long since my Mirena was removed in October. I tried Provera to "jump start" my cycle into regularity and I am now on day 8 of a very heavy, long period. I have had blood work and everything was negative. There is no signs of this stopping anytime soon. I'm so frustrated that I want to cry. It makes me want to just call off TTC. The others were heavy and irregular before trying Provera this month so I'm worried that the Provera just made things worse. So frustrated. Does anyone have a similar story? How long until I get semi-regular?