Bad breath, occasional white spots in mouth. Wassup?

Oral thrush. Signs of lowered immunity causing fungal infection - need medical rx with magic mouth wash #2 which has nystatin, calamine, benedryl and lidocaine.
Possibly strep. Sometimes on the back of the mouth-- on the tonsils especially --one can colonize strep which doesn't have a nice smell to be sure but certainly thrush or yeast might do this as well. But the same can be said for viral ulcers in mouth to some degreee as well. See you dr to check on this.