hi A., you got lots of good advice about losing the weight, and no, its not a mystery. the thing that might be throwing you, because it did for me, is that you really do have a new body now. i dont just mean your weight/shape, but the way your body works, including your metabolism and how you lose/gain weight. you will notice other differences if you havent already, my hair changed, my allergies changed, my strengths and weaknesses when it comes to illness changed, lots of stuff. not all for the worse, im not saying that at all. my nails never looked so good! though now i have to cut them so i dont scratch the babies lol ... my allergies are so much better, etc etc...... so what im saying is that the things that worked for you before simply might not work for you now. it can be confusing and depressing, it is for me, anyway. i never truly struggled with my weight before, i was always thin with little effort, and if i wanted to shape up a little, i knew what to do and it worked. now i am doing those things and it doesnt seem to make a damn bit of difference. not true, at least it stopped the numbers from continuing to climb, so thats something. but i can feel that i need to exercise not only more, but differently. i also feel that sleep, and my lack of it, makes a difference for me, i am just not operating optimally at all, and i feel like my body is hanging on to the fat out of stress. i dont know if im saying it right, but our bodies do that in times of stress, especially around the middle. so you might have to change the things you do to keep in shape, maybe more, or maybe just different. listen to your body and find what works for you, try different things, drink lots of water, and try to get some sleep and reduce your stress. you can get yourself back into shape, even if its not the same shape it was.