Hello welcome!
I’m sorry to hear about your current situation. There are many T2s on this forum who would gladly support you and help you.
What’s your diet like? What have you been eating and have you been testing your blood sugars?
For your teeth, I’d urge you to see your dentist asap & be referred to see a hygienist. In the mean time, make sure your tooth brush is soft-medium bristles, try and get tepe brushes or dental floss to really get inbetween your gum line and rinse with warm salty water which is anti bacterial and takes the edge off the pain. However if you can get your diabetes under control through better food choices and testing frequently, it’ll help your dental situation. Bacteria and high blood readings love a place to thrive in and your mouth is one of them.