2 year anniversary

Thank you everyone for the Congrats.  This hasn't been an easy journey.  I am struggling now trying to maintain.  I try to eat right and exercise, but with to bad knees, exercise isn't easy.  I have started going to the pool and swimming about 3 times a week, but that still isn't enough.  I fluctuate up and down by 5 or 6 pounds.  When I go up, it is the hardest thing to get it back off. Any ideas?  I would love to have your input PLEASE....

Best wishes!

Janet