DO NOT HOLD YOUR NOSE AND BLOW!! That can make it a lot worse!
I had the same exact problem. I ended up going to the Doctors, and then got nose spray medicine.
Does it make a kinda cracking noise when you yawn? Then you probably have fluid in your ear, which can eventually lead to an ear infection. My doctor recommended having your ear on the pillow like ear down.. Lol
Good luck!, and you should probably go to the doctor if it gets any worse! :-D