Orthostatic tachycardia

Back from my PCP and I actually have orthostatic tachycardia.  So, my blood pressure is normal, but my heart rate is going up too much when I stand up. I had an EKG done in the office and it was normal.  Now I get to see a cardiologist next week.  Yeah, more doctors.  Not too worried, my doc said that 90% of the time everything is normal.  And the rapid heart beat and mild nausea I've been feeling and attributed to anxiety probably isn't.  So, less mentally ill and more physically ill?  Yeah?  For now I'm on a high salt and fluid diet as that should help with my symptoms.