I, too, am having a difficult time dropping those pre surgery pounds. Honestly, if it weren't for MyFitnessPal, it would be even more difficult. I've fallen off the wagon, and there's something about seeing that calorie total that has kept me on the wagon in other moments of weakness. I highly recommend it - it's a free app, and it works if you use it.
Keep your head up - we're going to get through this!