Weight loss stall

Good morning friends ! I need your help ...I am 7 months post op (Roux N Y) and stuck at 78 pounds lost. Was steadily losing and then the last 3 weeks I am stuck ! Need to lose about 15 more pounds....I have done the usual of increasing exercise, eat more protein but still stuck. Any words of advice or tips ? I very much appreciate your help :)

Exercise and protein are great but the secret of losing will always be to reduce calories.

Yes, of course ....I do that too