Yes. Even after menopause, your body still produces female hormones and you can still have fluctuations. The medical community used to think that your ovaries "dried" up and quit producing. They now know that this is not correct. Your ovaries do still produce, just in much lesser quantities. We also store a form of estrogen in our fat cells. If we have a whoosh, well, we are also releasing a large amount of estrogen. This can make us have PMS type symptoms....hunger, irritability, water retention, etc. And, don't forget that you have other hormones in your body that can fluctuate, too. Hormones keep the wheels moving and we are full of them!
"Live the life you've always imagined." Henry David Thoreau