I was recently Dx with MCTD with antibodies for CREST syndrome and RA. I have been feeling exceptionally tired lately (sleeping upto 15 hrs for 3-4 weeks) and have a low grade fever... maybe. My usual temp for years has been 97, but recently has been between 98 and 99. I've been having temperature sensitivity, brain fogginess, light headedness/fainting, difficulty thinking and remembering things and an occasional shooting pain that runs from the back of my head to the top-left side of my skull. Lost 10 lbs in two weeks and feel nausous most of the time. What's up with me? So many symptoms I don't know what kind of doctor to see.