Diet and sleep are key. Too low carbs = low energy, too low calories = low energy, too much sugar = low energy. My work requires me to be on my feet all day and when I add hours to my day I go through a slump. I have to change up my diet to include more carbs in the morning and ensure I am getting enough calories for my energy needs. Water helps too ;-)
I would stay away from supplements and try changing your diet and habits first. You don't want to run off of borrowed energy do you? I love Lipoflame before I hit the gym but by itself I get the crazy gitters. Only use borrowed energy when you need to expand more energy than you can give yourself naturally.
You are making such amazing progress. Keep up the awesome work. Remember that a healthy lifestyle is a journey. It is not a point to be reached. Love ya girl!
Also - by watching some of your threads you were going pretty hard there for awhile. It could simply be that you were wore out.
^^^What she said^^^