Hi I Just Recently Have Started Having Multiple Panic Attacks

Hi i just recently have started having multiple panic attacks a day, i even went to the ER because i was convinced it was my heart (i had 3 within 24 hours at this point). All tests including the EKG were normal, im still getting them at least twice a day, heart racing, palpations, numbness in my hands, dizzyness and some chest tightness, no shortness of breath or extream crusing pain though. How can i get them fo stop? I dont even feel anxious or am i afraid of anything.