Weight loss after surgery

Ladies.....have any of you had difficulty losing weight after a hysterectomy? It's been 8 months and I absolutely can't seem to lose weight. I had lost 35 poundsbefore the surgery and although it wasn't quick weight loss, it was consistent. Since then I keep gaining and losing the same 5 pounds. I am walking about 4 days a week, usually 2.5 - 3 miles a day. My calorie goal is just under 1400 a day. I go over that on the days I walk because of the calories I burn and I usually stay a little under that on days I don't walk. If anyone else has had this problem after surgery, what did you do to get through it and start losing again?