Poor you, nitrofirantoin for a week, when I had it it made me feel really ill. I am still struggling like you, think things are improving then have some bad days like yesterday. I have used Ovestin as I said before, for 5 months. I don't find it stings, so that is a problem for you ad you may need it more often. It has made me put on a bit of weight in the last few months which is not good. I know it's that and not something else. You have my sympathy, it feels like chronic torture.