I'm experiencing the same thing. I'm 58 and still in peri! Thought it was over for 6 months than, bang, back it came. I am petite and always been able to maintain a healthy weight with normal eating and exercising. My weight has shifted to the midsection.
Rationally, I know what is going on, but emotionally it is so frustrating. I know diet is a key and I'm trying to make small changes.
I'm adding in more cardio and following the look great in 8 rotation using my vast collection. This is a very cardio intense rotation and I'm hoping to see if that, along with cleaning up my diet, will make a difference. I'll let you know.