Why can't I recover? Can't swallow, smell or taste

Sounds like you've been through some serious challenges. Did they remove any of your salivary glands? Or is your dry mouth a result of surgery and or treatment? I am recovering from tongue cancer surgery 2 years ago. I know that getting my one remaining salivary gland to work was a huge challenge. I used my homemade pickle juice. I would touch the pickle to the healthy, non surgical part of my tongue and that would trigger saliva. I also used Xylimelts mints that stick on your gums to keep my mouth moist at night. Some folks use them in the daytime, too. Available at Wal-Mart and Amazon. I used baking soda rinse and had a container I used as a spitoon. That was great for healing and later during treatment. Take care.