This is a Really odd question but I need some opinions on what you guys think this could be. So this is going to sound very weird but when I sleep sometimes I get very cold to where I will start shaking because my body is so cold, mentally I'm cold but I don't physically feel cold. If that makes any sense? Well when I get this way I get really sick as in I get so nauseous I want to puke and I get the shits (sorry TMI lol) but no matter what I do to try and warm myself up I can't. This will sometimes happen for about 3 hours then it goes away and I'm completely fine. Do you guys know what this might be or why my body does this? It's something I can't really control and it happens out of nowhere even if I have big thick blankets on me.