What could be the cause of my Ongoing Yeast Infection?

Every month I get a HORRIBLE yeast infection. Sometimes it goes away on it's own. This month, It's not only l I think I have it orally too! I have an extremely low immune system and tend to have to take lots of antibiotics all the time. I eat yogurt daily, fruits, and veggies are my only real source of food. I don't drink cokes or carbonated drinks, only juices, milk, sweet tea, and water. I am a diabetic or borderline though I'm on medicine for it. This is really getting out of hand, as now my husband has it! I feel bad for unknowingly giving it to him, and now I'm afraid to even kiss him as he might get it in his mouth too! I know I need to go to the PCP but symptoms just become noticeable and the dr.'s office is closed till monday. So what can I do in the meantime to help it to heal? As well as prevent it from coming back?