Another palpitation question...sigh

Mostly when I lay down, and mostly on my right side, I get a strange feeling in my chest, almost like a quick "clench" that will happen four/five times. Feels really,really strange. I occasionally get them sitting up, occasionally on my left side, but rarely when lying on my back. And they stop immediately when I roll from my right side to my back.

I would think PVC's wouldn't stop just with a position change would they?

My doc had just blown me off with a "not dangerous, whatever it is don't worry about it" type statement. I know my heart is okay, had a ton of tests run, so it's more of an anxiety causer to me than any thing.. that little niggling thing that you don't KNOW what it is, that has the power to drive you out of your mind!!!

I'm thinking gas, or muscle spasms. This doesn't sound like a heart related thing does it?

Thanks for reading my rambling..lol.

Sarah