I was sick with 2 different colds last month within a week of each other. Since then I have had a gooey sensation in the back of My throat which occasionally turns sore. Later I developed occasional pains in my chest in ribs. I've since noticed a small blister in the opening of my throat on the left side. I also had some pain in right arms and shoulder which has mostly subsided. I also have a stinging/burning sensation from my chin, occasionally down to my chest. The symptoms seem to change