Help!!! Any densit/hygienist/DA know what this is???

So like two days ago the top of my pallet started bothering me. It’s hurts pretty bad on one side when I swallow. It is a lump in my pallet but you can’t see it, you can just see where it is red. Please help. I have no idea what’s this is and I do plan on going to the doctor if it doesn’t go away in a day or two. If it helps I did have a sinus infection and ear infection last week that JUST went away.