The bad news is... there's no guarantee that your migraines will stop with menopause. I know, it's not the answer you're waiting for. You want a resounding 'YES your migraines will definitely stop after menopause.' There are no more fluctuating hormones, so there's a really good chance they will stop.
The problem is that hormones may not be your only cause or your only trigger. The most well known phase of a migraine is the painful headache. But the causes and triggers are different things all together.
Not everyone has exactly the same combination of triggers. You might be more reactive to: food intolerances, allergies, or glare. While I am triggered by: smells (smoke, perfume, incense) and hormones. Other triggers are menopause, stress, the weather... the list goes on.
Or an injury may be the cause of your headaches.