Gum recession after two teeth removed. Infection?

In September and December of last year, I had teeth removed due to painful cavities; the first molar, the second second premolar, respectively, on the right side of my face. Since then I have notice my gums slightly receding on my first premolar and second molar, with the occasional minor irritation, but no bleeding, pus, or other alarming signs, so I simply endeavored to brush easier, and take greater precautions to kill the bacteria in my mouth This morning, though, I washed my mouth out with hydrogen peroxide, and the sting was almost unbearable! I looked at the gum sockets immediately after wards; where my teeth had been pulled from, and there were white spots! I was panicked for a few moments; thinking maybe my gums had receded to the point that the bone was sticking through, but the white spots went away as I washed my mouth out further...they certainly were not bone! Are my gums infected?