Keep gaining in the middle

I am I guess per memopausal, had my period once in the past 6 months, before that it was normal. I am 50.5 years old, I keep gaining weight, and it all goes to my middle, I feel so bloated, I am putting on 1-2 lbs a week it seems, I have stopped drinking pop, upped my water intake.... I don't eat alot, have a BM each day.... I am thinking of doing the lemonade cleanse.
Is that a good place to start?
thanks