first ogf all congrats on loosing all that weight, great stuff!!
we all hit a plateau when loosing weight but the best advice is keep going, ive been told in the past to change when im eating, have a jig about with your food coz sometimes when we're dieting we tend to stick to the same things.
i to put alot of weight on after having kids, it wasnt letting myself go more just eating convinience foods as it was easy, as well as eating the same as my partner when he obviously had a different metabolism to me.
just try and stay positive and keeo going!