The infection must be dealt with. You might want to talk to your doctor about further testing. You could see a practitioner that does EAV testing, personally I had these done countless times but this may lead to some more clues.
Glaxony suggests Iodine/Collodial silver which may be wise choices. Raw garlic is well known for its Antibiotic properties as are most spices. Black Cumin is a wide spectrum antibiotic/antifungal/anticancer spice. Neem, graviola, lactoferrin, coconut oil are very good as well.
Check with your practitioner about bolstering nutrition, things like Vitamin D, Vitamin A, B vitamins and heavy use of Vitamin C would help. Minerals, fats and amino acids all support immune health.