Perhaps the girl who has the thrush needs to visit her doctor for an anti fungal medication. Thrush can be pretty painful. I am sorry this happened to the both of you, hope it gets treated promptly!
~VQ
I was more concerned about spreading the fungus onto the girl (not the other way around). I could have had it on me before she gave me oral (if I knew I had it I wouldn't have done unprotected oral)
For me I used anti-fungal cream and it went away.
You can get all sorts of things from unprotected sex. And oral, is sex. You have to use a condom with every single sex act to try and protect yourself and your partner. Yes, you can get a yeast infection if the girl has a yeast infection in her mouth. Can you get in to see your Dr? If not, is there a clinic you can go to? While you're there ask for free condoms so you always have some available.