A dear lady I work with has this problem with swallowing. She also coughs alot when she tries to eat or drink. She was recently diagnosed with acid reflux. She raised her bed so that she is almost siting up when sleeping and cut out caffeine and it seems to be helping her. Hot herbal teas will help too if this is what is causing your swallowing difficulty.
I can't imagine how scary this sort of thing would be and seeing my friend go through it makes me really feel for you all. Hugs
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Be who you are and say what you feel because those who mind don't matter and those who matter don't mind - Dr. Seuss