Humidifier vs. Vaporizer?

FirstTimePregnancy

I have tried a cool mist humidifier to help with my sinus congestion and dry throat but it doesn't seem to be working and I continue to have difficulty sleeping as a result.  Has anyone tried a warm mist vaporizer and found it to help?  I figured I would ask before I went out and bought one, as I just recently purchased the humidifier only to be disappointed.  Thanks in advance!