I ve had a constant cough and pain in my joints and bones in general. I have also been getting very cold and my head has been feeling so heavy lately, it feels like I need to lay it down on because I almost can t even hold it up, when I m laying in bed I have to prop my neck up with a pillow because of how heavy my head feels. When I walk too fast , breathe too heavy or too slow or drink more than a few sips of water or any liquid I gag so much to the point that I throw up, only a little, but this happens constantly. I was wondering what these might be symptoms of and if I should see a doctor for help.