I'm in the same boat here... Whenever I get a cold, the worst part is the excessive saliva production. I've learned over time that if I don't spit it out, I end up swallowing so much saliva that it irritates my stomach and I vomit. Also, when I swallow so often, I also swallow air which makes me burp - which, in turn, makes more saliva. Are we having fun yet??
So, for the duration of my cold, I have a spit cup that I spit into every 15-20 seconds or so - it's absolutely ridiculous. I have to a) keep it away from my curious toddler and b) be extra careful not to confuse it with my water glass that I have to continuously drink from so I don't get dehydrated! It doesn't stop at night, either... it keeps me up, just like some of you. I suck on menthol cough drops, which helps some, but not much. I usually just end up suffering through a few sleepless awful nights until the worst of the cold passes.
My doctor was completely ambivalent and unhelpful. Have any of you had success with finding an answer out there? Any suggestions are so very much appreciated - this has gone on for years for me and this is the first time I've actually been successful in finding anything out there in the ether... and it is, at the very least, very validating to know that I'm not the only one dealing with this frustrating thing.