Uncircumcised?

Hi, my bf & I have been TTC for awhile now but I keep getting reoccurring yeast infections. Everytime we go to the doctor I’m fine, we’re fine I jst always end up with a yeast infection! This has never happened til I got with him & this is my first time dealing with someone who is uncircumcised. how do I stop this? He’s really clean by the way, so idk how it keeps happening