Have you tried any lifestyle changes yet? Things like eating
really well, supplementing electrolytes, reduce stress, avoid caffeine, start doing something to take care your well being like meditation, yoga, or exercise.
Getting diagnosed at an ER is probably not serving you well. The ER will stabilize you in case there is an emergency. Once the emergency is over, you should be thinking about the next step which is following up with a primary care doc and/or a specialist.