You might try a little apple cider vinegar in your last glass of water after you brush your teeth before bed. ACV "kills" bacteria that causes bad breath, coated tongue etc. - Hope it works for you.
Tooth brush on your tongue, darling
Go see a dentist and get your dental hygiene up to date. Chewing tobacco caused a hole in the lip and cancer to a man I used to know.
Stop chewing tobacco. And go see your doctor. Blessings - Blu