Hi I’m reaching out for some help regarding a painful patch on the roof of my mouth / upper left gum area (photo attached – taken with a mirror to get a better view). I recently noticed a white and red patch near the upper left side of my mouth, kind of where the gum meets the roof. It’s painful, especially when I eat or touch it with my tongue. It’s been there for a couple of days. I’m not sure if it’s something like a canker sore, irritation from food, an infection, or something more serious. I haven’t had this happen in that spot before, so I’m a bit worried. Thanks for any input!