You could try takin probiotics they really help your good bacteria and fight off thrush. You can take 3 a day until the thrush is gone (say about 5 days) then 1 a day to keep thrush from returning. Good luck.
If it's approved for babies it's certainly not going to harm you. It might in fact help. Actually, any anti-bacterial cream would work as well. Scratching allows bacteria to attack your skin and if you stop them you'll heal pretty fast, as you noticed with your daughter. Try it, and good luck.