hi for the last two weeks iv been feeling as if im going to faint i did faint two weeks ago at work it was put down to stress. i had a few days off work and rested went back the following monday it happened on three occasions were i felt giddy and was ready to faint. i get a warning before it does happen. im worried, my doctor has sent for an ecg for me. when this does occur im shaking with butterflies all over feeling its weird its affecting my home life. i also get the feeling my heart is beating too fast please can you tell me what this could be iv had my blood done and my blood pressure is not low