Why is he suddenly so sensitive to yeast infections?

Okay so my boyfriend and I have a problem. We've been together for 3 years now and are expecting our first child. Everything is great except for one thing. Just before I got pregnant, a few months ago, I got a yeast infection. Unpleasant but nothing too bad.We went to see the doc as my boyfriend had a rash on his penis too. The doctor said it was yeast and that he should get a treatment as well so we both, at the same time, treated the infection and it went away. Yay! End of the story? Sadly no.

Some week later my boyfriend had the rash back. So we both took the treatment again. I had no symptoms but I thought it must have been back and I contaminated him again. It went away again. Just to be safe we used the comdom for a while to make sure non of us was still infected. Well the rash came back again! Without any unprotected sex!. I still had no symptoms. My boyfriend saw the doc again and he gave him some pills to take orally that should be more effective than the cream (he would have given me some too but I can't take them as I'm pregnant). It went away and we thought that it was finally the end of the story and went back to unprotected sex. But now it's back! The doc he saw last time that if the pills didn't work, the only other option was circumcision. My boyfriend is willing to do this but I wish there was a way to solve the problem without going to this extreme.

I feel so very bad about this whole situation. Am I contaminating him over and over again? Or is it getting back by itself? I took a pap test when I got pregnant and specifically asked the doctor if I was still infected. She said the test say no. I was clean at least at the time I took the test. And I never had any symptoms ever since! I still got treated many times since just to be safe. I don't know what to do! I can't take any stronger treatment because it would be dangerous for my baby. I don't want to be the source of his health problem! I never had any issues with yeast infection before in my life and we had several years of unprotected sex before without any problems. How come he suddenly get so sensitive? We were both virgins when we first had sex together and we both were tested for all STDs. I was tested recently because I'm pregnant and we are clean. What is going on suddenly?

I've put his name on a waiting list to see another doctor but I don't know when we'll get to see one. In the meantime we are trying to keep any sugar in our diet to a minimum because we heard it help.

Anyone ever faced something like this?