There is something wrong in my throat .Been getting choke at night laying down and now sitting up. It's scary. Been sleeping in recliner so I won't be flat on my back.White foam comes up, thick clear.i cough all the time. This started after they put a scope down my throat about 1 year ago and I have to take little bites and chew each till I can swallow. Should I be alarmed? ? Or what do you think it could be??