A.S.
I had the same problem, no energy. I do not suggest taking those weight loss pills. You didn't take pills to make you gain weight, don't take them to help you lose it. Here is what I did starting in October 2010 and as of today I have lost 35 pounds without changing my diet.
I would wake up and immediately lay in the floor and do 20 sit ups and 20 crunches. Took a shower, ate breakfast with the kids, etc. The only time I have to actually work out is after the kids are asleep at night. So at 8pm I put the kids to bed and I pop in my Jillian Michaels 30 Day Shred and do my work out. When I first started I did level 1 for 3 days, then a day break, then level 2 for 3 days, a day break, and then level 3 for 3 days. Now I do 2 levels at a time and I mix it up. It's amazing. If it works for someone as over weight as I am then I know it will work for you. When I started working out I was 234 pounds and I weighed in today at 199. Good Luck