How Can Sore Throat Be Treated?

I have a minor infection on my cheek (a spot or two) and decided to check it out, then I looked deeper towards the back of my throat and saw what I initially thought to be something stuck to my palate like a cumin seed. Upon further inspection however, I realized it s probably a hole. It moves (gets bigger, gets smaller, or disappears) depending on my mouth muscle control and movement and I was able to poke it with a toothpick and didn t feel anything and it seemed to get wider. I never felt it before but now that I see it and know it s there, I can definitely feel it. I took a picture of it. More info: perhaps 2 months ago I had a really bad cold with high fever that lasted for about a week and a half. I beat it with Ibuprofen but the sore throat and mucus coming down my throat never really went away. Now my throat still is a bit sore and I still get lots of mucus at the back. I got a minor infection near my bottom right wisdom tooth 1 day ago, I think it s unrelated but that s why I was looking around my throat.