Hi, I Have A Head Cold. Nothing Spectacular. Recently, When

Hi,
I have a head cold. Nothing spectacular. Recently, when I blew my nose I had a very disconcerting feeling that the earth was tilting. It was actually dangerous because I was driving at the time and the road seemed to be twisting under the car. Except for the particular situation on this occasion, I figured that this is not so strange because of the links between nose, ears and balance.