I feel this strong pulse in my neck while I lie down. This is debilitating and can feel that strong pulse which doesn't allow me to sleep.. sometimes, I feel breathless and on and off chest pain.. I visited cardiologist and he said my heart is fine.. My ECG and 2d echo is normal. No thyroid and bp is always between 110/60-110/75. What can be the issue and how do I sort it? I am on Inderal 10 mg for a month.. today is Day 12 of the dose..