I have been on Synthroid 75 mcg for 4 months. My body feels like it is dying now. I felt fine before. Now so tired, depressed, anxious and my bones/joints scream out with pain from head to toe. It's so bad I can't get off the couch. My endo says blood levels are perfect. GP says not sure why - but all this since I started. I am miserable - give me my life back! I wonder is it too much or too little?