It is important to rule out an arrhythmia
as the cause of symptoms and I foresee that your cardiologist has ordered a Holter monitor
or perhaps an event monitor to assess your EKG. That is certainly the first step. Other tests to consider are tilt table testing and carotid sinus massage
I would recommend to take it slow until you see our colleague tomorrow.
Dr Brenes-Salazar MD
Mayo Clinic MN