Does anyone know how to stop my sneezing?

I have a head cold with lots of mucus. It keeps irritating my nasal passages and makes me sneeze like crazy. I blow my nose but it just won’t stop irritating it. I’ve tried rinsing and that only works for a second and its back to making me sneeze. Funny thing is that it only happens from the left nasal passage. When I am not sneezing I feel a terrible tickle there. It’s driving me nuts. It doesn’t have anything stuck there. I think it may just be an irritated nerve. So how do get it back to normal?