Everyday I'm breathing out of one nostril. Never both. Help?

I'm 14 years old and I can't remember a day when i could breathe with both nostrils. I know it's not normal. I just want to breathe normally because this has been causing alot of trouble for me. I feel heavy and drowsy and I feel like it takes alot of effort to breathe. I heard there is this surgery but it sounds expensive, and where am I going to get the money for that? Im 14! So anyway, is there anyway to fix this without surgery or medical procedures?