I've had dysphagia due to low phosphorous. My phosphorous became low when I started taking thiamine. Thiamine boosted my energy noticeably for a day or two and then caused severe fatigue. It's a long story, involving refeeding syndrome, but I was able to figure out that the thiamine was causing my body to use more phosphorous, and thus it caused my phosphorous levels to tank. Low phosphorous caused severe fatigue plus trouble swallowing for me. I drank several glasses of kefir, which is high in phosphorous, and my energy came back within a few hours, so I knew the problem was low phosphorous. I eventually ended up getting a phosphorous supplement, which I take a couple of times a week. Every once in awhile my pills will start to get stuck in my throat and it's always a sign that my phosphorous has gotten low again.
This may or may not be part of your problem. We are all different here!