in two of last three nights I awakened from a dream to notice a fast pulse & I could feel my heart beating ; then I went into a state of shivering for a while. I had a large normal looking stool after I settled down. In very early morning I noticed another bout of fast pulse and then I ll settle down. I don t typically have a stool at night. I ve routinely urinated at night without to date having been medically tagged (e.g. all lab results normal) ; and so I again urinated twice before this bout of shivering hit me. But this shivering is a novel event for me?!