M.S.
Thrush is such a vicious cycle. My breastfeeding daughter got it and my nipples were killing me, so painful I thought I would have to stop nursing! We used the oral nystatin in her mouth and the nystatin cream on my nipples and maybe I wasn't as diligent as I should have been (I was pumping too, every morning), but it took probably 6 or 8 weeks of the medicines to finally clear up. My daughter's ped said that was very normal to take a long time to clear. Good luck!