I don’t have any other side effects, i feel fine, just the rash.
If the local infection is your only symptom, you should not do any diet and better see a good MD to see if there could be anything else wrong down there.
Starting on a diet, buying suppl. and taking antifungals will change you gut flora, but if you did not have any GI issues or anything else related to a yeast overgrowth in the GI tract, it’s unlikely your current issue will disappear.
Has the change in diet you’ve made done any progress yet?