I get the same reaction but not all the time and it always goes away within a bit ...it is kinda scary though and I do wonder what is going on inside my body but whatever it is its gotta be good.it doesn't matter whether I am lying down with a heating pad or up walking round with it on..I stil have the same reaction but not all the time only some of the time...anxiety is something I am used to dealing with anyways so I just let it pass and it always does for me..hope this helps CE's do me that way too sometimes..