Suggest Treatment For Candida Infection On Fingers

I have diabetes 2. My condition worsened after my 17 year old went into a hypoglycemic coma 1.5 yrs. ago. I've lost countless pounds, I always have strange infections from my fingers, I'm extremely clumsy and I can't hold a thought. But three weeks ago, I hit my head hard on an RV hitch. The bump seems to be growing and is mushy. I have nerve pain threw my shoulder and arm. I also almost always have candidas whenever I get hurt. My husband says don't worry about it. Your advice?