Strange Symptoms Related to Low Blood Sugar ?

Hi Everyone,

I have a very strange symptom that several docs have not been able to figure out and I'm wondering if anyone here has had the same thing or thinks it might be related to hypoglycemia.

About 4 hours after my last meal if I stretch really long with my hands above my head or if I go from a sitting to standing/walking position as I normally do I get a very odd pulsating feeling in my head and ears that corresponds with my heartbeat and I feel faint. The pulsating feeling is over VERY strong and my hearing will be muffled in time with my pulse, as if someone were putting their hands over my ears and taking them off again, over and over.

This goes on for about a minute to a minute and a half and then things even out and I'm fine.

My GP sent me to a cardiologist, who did lots of tests and sent me to an electrophysiologist who also did lots of tests, who sent me to an endocrinologist, who did lots of tests and no one knows why this happens.

It is also unique in that it seems to happen only when it is hot outside, and I live in Nevada so it gets quite hot here. I also am usually not having a hunger sensation when this happens, but thought it might be blood sugar related because th only thing I have ever been able to pin it down to is it having been about 4 hours after I last ate and/or heat.

I drink ALOT of water and stay very hydrated. This is driving me nuts!!!

Any and all help would be greatly appreciated!!