My mom had used a Neti Pot for for years and I always thought it was disgusting!  When I was pregnant, my sinuses were so bad that I really could not breathe and was willing to do just about anything since I couldn't take decongestants.  At first when I used the Neti Pot  I almost vomited.  It takes a little while to get the "technique."  Additionally, my sinuses were so blocked that the water would go in one nostril and not come out the other side.  I stuck with it, using the Neti Pot twice a day and after about 3 days the water did begin to trickle out the other side.  In about 2 weeks I was feeling quite a bit better.  I have recommended it to many friends, especially those who are suffering from sinus issues during pregnancy since this device is so benign it can be used during pregnancy and nursing.   I continue to use it periodically, and especially if I am starting to feel congested.  Usually within a few days I feel much better and didn't need to use any medication.