21, tachycardia and sharp chest pain Had a tilt table test and 10 day heart monitor. Possible pots. Will electro physiologist give more answers? Why?

Tachycardia. It may because it provides details and the electrophysioligist can intentionally increase your heart and see how your heart reacts. It is INVASIVE with significant risks however, and therefore it is done only when there are concerns about aberrant conductions etc..