Try to get rid of the stuffy nose by using a Neti Pot. A neti pot used with a saline solution can help get rid of a stuffy nose.
Use humidifier or vaporizer in your room at night as well to add moisture to the air and prop your head up to keep it elevated.
Essential oils applied to your chest or other parts of your skin where you can breath in the essential oils will also help to get rid of a stuffy nose and help you breath better and sleep better at night.
Try applying some Chamomile or Peppermint essential oil to your chest or other part of body to help relieve your stuffy nose overnight.