I have the same problems, though I've been diagnosed with hypertension, vasovagal syncope, and a mitral valve prolapse. However, like you, when I'e had symptoms I've checked my BP and pulse rate and both have been normal. I was told I've been having anxiety attacks and was prescribed...
My first thought, when this first happen to me a few weeks ago, was that it was a low blood sugar issue. When someone's blood sugar levels get low enough, they can feel very dizzy, weak, and even faint. Generally your blood sugar levels get very low when you don't eat enough, or...