You're losing more than 1 lbs a week so you're completely on track for healthy and normal weight loss.
While that's not comforting - you are losing. And if you've stopped losing then you need to review what you're doing.
Getting another surgery may not help if you're over eating or eating horrible food.
A lot of people who get more invasive stomach altering surgeries end up gaining all the weight back - and more - and stretch their new stomach to a larger size.
Just keep at what you're doing, monitor your calories closely using something like The Daily Plate and your activity using something like the FitBit ($99 / free website with tracking, tracks your sleep, your activity level, your steps, mileage, and food) and see where the discrepancy is.
Since you're doing this for 3 more months make the best of those three months and write down every single thing you eat and the amount (measure it). And invest $99 in a FitBit and track your activity effortlessly so you can see how much you're really moving every day (you may be shocked).
You need a caloric deficiency of 500 calories per day (either by less food than your height/weight needs) or by burning via activity to lose 1 lbs / week. Chances are, at your weight, you need around 2,400 calories to maintain your weight (with no increase in activity). So drop your calories to 1,400 / day (a comfortable amount) and walk at least 5,000 steps a day (it's an achievable goal for most people - whereas 10,000 steps can put some people off initially) and you'll see movement.