HELP ! ! !

okay, I have completely lost my ambition and drive. On my last weigh in on here (July 2010) I weighed 195. Well this morning I weighed in at 237 lbs. I have been watching the weight climb about 1 -2 lbs a week, since October. I honestly don't know what is going on. I walk about 1 mile every morning (it isn't a speedy walk every morning, because I am pushing a wheel chair or pulling children along with me, but it is still moving), I use my eliptical 15 minutes at least every other night and this past few months we have been doing a simplified version of Zumba on Tuesday afternoons with the kids in my class. I was doing really well with the diet part, until this past month and now I just am starving and needing something to eat continuously. I need some new advise and some pushing in the right direction again. I am hoping that it isn't connected to the medical problems I have had lately with my Uterus. Thanks in advance for everyone's support and hear is to a new beginning to an old goal.