I had that problem a couple weeks ago. It lasted about five days. I think it might be candida related since I had slipped on my diet around that time. It got better once I started back on my Lyme diet.

i used to get it bad - when I first got symptoms - before treatment...had a sensation of lump in my throat, and phlegm would sit in my throat...and I was constantly swallowing to try and get rid of it...
I had sudden onset sleep apnea at the time, too...and I think it contributed to that.

It comes back every now and then...usually when I am herxing.