long story short, had a lump on my gum a year ago, dentist did a root canal, since then I have had metal fog and a feeling of being drunk since the procedure. Numerous doctors, test, scans and no findings. Went back to dentist few times and he said it was fine. Then one visit he said two other teeth were dead. Went to another dentist for second opinion. I have had two more root canals and still no better. Now having the first tooth done retreated. Still do not feel any different. Now they say I have yeast/bacteria in my gums. Have not completed the retreat and am now debating on just pulling all of them but they are all my front teeth. Symptoms I have are 24 hour brain fog, my bottom lip is tingling, tired, right lung pain and just a whole bunch of other stuff. I really need someone to help me because the doctors are just no help. I don't know what to do...if anyone has had similiar experience or advice please write back.