I am a 28 year old female. I sometimes wake up with a pounding heart beat, it's not tachycardia, just a pounding heart beat. No other symptoms except over the past few weeks I have experienced pulsatile tinnitus in both ears but not both at the same time. I have never had any health problems, I eat organic and whole foods only, no caffeine or junk of any kind. Any idea what could be going on?