Stacey,

I can only speak from personal experience (there may be other causes). For me, I found that I was experiencing the same thing. I spoke with my doctor about it and he said that milk and dairy products naturally cause thickening of the mucus we have in our lungs and throat etc. As soon as I cut back on dairy it cleared. If I eat too much dairy it starts all over again. This may or may not be what is happening for you. Hope it clears up for you soon. Happy LCing!

Betsy