I have been having a nauseaus, disoriented, dizzy feeling in my head, pressure all over, and have a weird smell in my nose. It feels like I am coming out from under gas at dentists' office or anesthesia from surgery.

Time to see a doctor about this.

Definitely see a doctor, those can be symptoms of a minor seisure, stroke, vertigo or epilepsy. Although it may not be serious, it would be good to know if you have any conditions that you would need to adjust your lifestyle for.
What is the smell? How long has this been going on? Are there any drugs or substances you are taking? How frequently does it occur, and how old are you?
Please respond and let us know how it plays out...

Good luck feel better.