I'm so sorry to hear your frustrations!

Now for solutions--what worked for me:

eat an apple every day.
watch out for coffee--lattes and associated muffins and such really add up
make sure you are eating lean protein, and reduce carbs
drink lots and lots of water every day, all day long
do not drink sodas--even diet sodas. Stick with water
and don't forget to eat an apple every day!

Can you do Pilates? Pilates really helped me. I think because my core got stronger, I was holding myself up more, which actually does take more energy (calories) to do all the time.

Finally, take time for yourself and get enough sleep. If you have a partner, he or she can help make sure you are able to do this. If you are a single parent, then it's alot harder, but even 10 minutes alone without interruptions can really help energize a person. At least, that's what works for me.