MrsWaltahC's Losing Weight Wish

So...losing weight has been so difficult since I've had my children. I had them both 10 months apart. Two in one year!! I lost the weight once before. Got back down to prepregnancy weight. Can I do it again? Why is it so hard this time?? Is it stress? I hope that I can get the weight off again so that way my next pregnancy, I will be healthier than I am now.