What is the best vitamins for a 20 year old to take I can't sleep at night what's so ever and I always wake up with a stuffy nose?

Lousy diet. You have a mild form of dysautonomia. The congestion is because of changes in the control mechanisms in the lower brain that affect the balance of the autonomic (automatic) nervous system. Go to my blog entitled "oxygen the spark of life" the latest post is on child abuse but go to earlier posts that explain dysautonomia and its relationship with high calorie malnutrition.