I had the Lap-Band surgery June of 2015 and had lost 68 pounds in a year. I didn't drop as fast as I would like (I am sure my personal habits were to blame). No complications with the band other than discomfort, but I realized that I needed a different option so I had the revision surgery to the Sleeve this past 4th of July.
A few days after the revision surgery I came home and weighed myself; I gained 3 pounds. I think it was due to the IV Fluid, unless I was right about the Dr. smuggling something in my stomach (I had my surgery in Mexico, lol). However by the third week after surgery, my total loss was 20 pounds. It will come off, don't get discouraged and be aware that in a few more weeks you might hit the stall (which is very common). I had my stall for 3 weeks, although it felt like months. I am back to losing again. Yay!
Think positive so you can heal well! Slow or fast, you will be dropping. Best wishes.