I agree, you should be proud of the changes you've made so far. Even if you haven't yet seen results in terms of weight, your current diet has lots of good health benefits. I also agree that doing a check on your portions and actual caloric intake is important. If you ate 100 more calories per day than your body needed to maintain its weight, in a little over a month you'd gain a pound! It might take some experimentation to find what a good level is for you to lose without going too far, but logging your intake for a week will give you a place to start.
It's true for everyone, but especially true for women and doubly true for those entering perimenopause or menopause ... exercise, particularly weight training, is crucial for keeping that metabolism going. Left to its own devices, our bodies naturally lose muscle tissue starting at about age 20. The less muscle you have, the slower your metabolism. When perimenopause and menopause hit, the muscle loss accelerates. This is one major reason women gain weight as they age, even if their eating habits don't change. So, weight training will rebuild that lost muscle, and help your metabolism creep upward again. Not to mention that the exercise itself will burn calories.
You might want to pick up one or both of these books for more information based on solid research:
Strong Women Stay Slim - Dr. Miriam Nelson (she also has a web site at
www.strongwomen.com)
Moving through Menopause - Kathy Smith (she also has a DVD by the same name)