It is as always a one day at a time prospect. The manuka helps but so early in it does sound like you are going to have a tough time of it. Be meticulous about rinsing with the baking soda rinse, do it after you eat or put anything in your mouth. Some foods - texture, or ingredients are irritating. Try cleaning your teeth with something less shocking like a natural tooth paste with a different flavor, as peppermint burns, so does the flouride. A different toothpaste flavor( I use a fennel one bought at a natural food store ) will help. Try softer, bland foods, and thicker luke warm drinks. Pump up your protein intake as it's healing. add some to a smoothie, just to help increase calories. It will be a long hall. But keep in mind... survival is your goal. Even if it hurts like a bugger, you have to get your nutrition, and fluids. push yourself to meet your needs in this respect. Then make sure you get some decent pain meds from the dr.
hugs!