I don't think I need melatonin. I'm able to got to sleep fairly easily at night. I do take a multivitamin with B in it and, like you, it makes no difference. Some days are better than others. Today was a stay in bed resting all day kind of day. I am sure the heat is not helping with this fatigue at all. The U.S. is due for a huge heat wave coming up this week. UGH!