Hi, I am a 31 year old male, 170 lbs. My heart rate has been dropping to low forties and sometimes will race to around 125, before settling at around 72. this comes and goes and usually causes dizziness, tight chest and cramping pain in my chest. Also my heart pounds VERY hard and somewhat slow while urinating. any ideas? I have been to a dr, and wore a monitor, but dr is not telling me anything at all, results from monitor have not come in yet, but the stress of not knowing anything at all, not even a what it could be, is getting to me. Thanks for any light you can shed.