Heather,
I remember when you first started posting and it does look like you have made progress although it may not be as much as you've wanted. Losing weight is hard, maintaining a weight loss is hard. You have kept 50 lbs off and that is something to be proud of.
My suggestion would be start counting calories just to see where you are at and then work on improving that. Also work on doing some exercise regularly. Fitday.com is free for counting calories and walking is free is as well although good walking shoes help. Also keep posting