"a&e"

i had ecg at my doctors it came back irregular heart rate the doctor sent me to a&e was seen fairly quickly blood taken another e c g then after a wait was taken to cubical dr came looked at my hands and feet eyes and under my tongue said i had not had heart attack i was to have chest xray and if that was clear could go. The doctor said it was clear sent me home i am in limbo i was laydown for e c g and can,t see why it was irregular i get out of breath feel exhausted and chest aches on walking i want to know why