I have had 3 different bouts of sore throat (sudden onset), sinus drainge (yellow to green), and clammy skin, also night sweats, no fevers, since the first week in January of this year, each bout lasting 3-4 weeks. I m a diabetic (several years) taking metformin, dose increased in January to 850 mg twice daily. Are these symptoms due to allergies to, for example, oak or mold?