I have been suffering from sinus for 8 years now. Doctors also said that a have a very slightly curved nose bone. I sneeze everytime I get up from bed?

Allergies. Sneezing is very suggestive of environmental allergies. At night some of the allergens which are most common include dust, mold and pets. Some common sources include the mattress (more than a few years old should have a dust cover), carpeting in the room or an attached bathroom.