It's exhausting being exhausted ! !!

It’s so frustrating to want/need to come home from work (at a desk job!) and be so exhausted that I need to take a nap. I don’t know if it is the heat in Atlanta, although I don’t work outside and am not really in it very long, but I can’t seem to keep my energy level up. Sometimes I wish I had kids just so I’d have to push myself harder. I know part of it is my BS levels are always on the high side and are not regulated as they should be, but can it all be just due to that and the fact that I need to lose weight? it’s hard to exercise and walk when you don’t have any energy. I’m frustrated!