Not sure at ALL if this might be useful, but check out the symptoms of Myasthenia Gravis (MG). I too started out with slurring speech and feeling of choking/not being able to swallow correctly. This started out after a sinus infection (at least that's what my internist diagnosed approximately 8 mos before other symptoms began appearing). Later on, I had serious weakness and while weight lifting at the gym, almost dropped a 40 lb weight on my self. MG sometimes starts after an infection or traumatic event (like car accident).. Hope this gives you a little nudge in the right direction. If it sounds right, go to a neurologist, who should be able to diagnose - or rule out - through tests.

best of luck,
Lisa