My doc knows my way of eating has kept me in the normal range since a month or two after diagnosis. She still tells me it's perfectly fine for me to have a slice of birthday cake every now and again, at parties, so I don't feel left out. I think she figures no-one can keep up a diet without cake?
Just go with your meter, it knows better what's happening in your body than your, (or my!), GP at any given time. My meter
loves meat, poultry, fish and eggs, does yours?
As for exercise, not my area of expertise, but considering the diet's the main thing... Anything you do is a bonus. One long walk or a bunch of small ones will lower blood glucose. Anything strenuous'll make you spike most likely, but in the long run you lower blood glucose... I figure, whatever you do is a win. But that's just my take. Find what suits your life, really.