I've had this as well. I knew there had to be something else going on though. I saw 3 doctors who took blood tests and when everything came back "normal" they wrote it off as symptoms of depression. My 4th doctor was an endocrinologist and after seeing my blood test results told me it was my thyroid. All doctors have their own take on what normal TSH levels are and for her it was too high. I started taking synthroid and noticed an improvement. I wasn't jumping off the walls or anything but at least I could walk the dog without feeling drained. Be persistent with your docs if you go. I think some are way too quick to blame it on the depression. Good luck!