Eat a lot of cold foods, like ice cream, popsicles. Cold makes the swelling go down. It could be because of your allergies or you could have a virus. Drink lots of fluids and suck on some icecubes.
I would stick with tea and lemon with honey to sooth the throat, there might not be any pain, but you shouldn't take medicine if you don't know what the reason for the illness is. Hope this helps, get well soon, good luck to you.