The tight/choking sensation, I felt with my thyroid, was I had felt like there was a big clump of something, stuck in my throat...I kept feeling like I needed to clear it out. Then when I ate certain food, it felt like it got stuck in there, and I would have the sensation, that I was choking, but I wasn't, it just gave me that illusion, since the nodule on my thyroid was pressing in on my throat.
This is the best way I can explain, how mine felt...I am not sure on how others experiences are.
I would definitely tell your Dr, in the morning, so he/she will maybe will run a sonogram, just to see if there is anything on the thyroid.
Have you been diagnosed with nodules??
They also went down my throat with a scope, they did it right in the office, and he said, he could see the lump pressing into my throat.
So your Dr, might go that route too...Don't know, but it is definitely important to let him know what you are feeling.
Good Luck and Keep me posted!