If you get stuffy as soon as you lay down in bed, then your probably have an allergy to dust mites. These microscopic mites live in bedding and other places where human skin cells are shed. Every bed has these mites.
It helps to wash your bedding once a week in very hot water, especially your pillow. Also, you can purchase a special zippered pillow case that goes under your regular pillow case made with a special material that stops dust mites from penetrating your pillow material. Look for this allergy-related pillowcase in the bedding section of any department store. And, instead of natural pillow filling such as down, or a foam filling, use a special allergenic fiber fill instead.
jtdraig is right about the nasal wash. I use a nettipot every night before retiring and every morning, and it works miracles for my allergies.
Good luck with the stuffiness. It is hard to sleep well when you can't breathe normally.
