Relief for Pregnancy Post-Nasal Drip?

So I'm 10w3d and lately I've been having awful post-nasal drip. It feels like there's excess mucous in the back of my nasal cavity, and it leaves me constantly clearing my throat. I don't think I'm sick--I don't have a cough or a runny nose or anything like that. It's just this post-nasal drip thing that's driving me nuts! Anyone else had this during pregnancy? Will it go away? And if not, how can I relieve it? Do you think getting a humidifier could help? Thanks!