Hello and hope you are doing well.
It could be that the left side tonsil is enlarged and is causing your symptoms. As tonsils are lymphoid tissue, they can get enlarged due to lymphomas. Please consult your doctor at the earliest for proper evaluation and therapy.
Hope this helped and do keep us posted.
Just a thought. A while back I choked taking some meds, after while I felt like there was something in my throat. This went on for days. I got out my big mirror and a new toothbrush as a tongue depressor. Much to my surprise my epiglottis was fiery red, I didnt get any answers from my Dr. he just sorta said I am a head case. A few days later it was gone. The Epiglottis can swell and cause serious breathing problems. Dont wait around it this might be the case, it can kill you because you cant get any air in.
You all might want to check out a great web site site called "earth clinic".