Hi, Dina! Good to see you again -- great question. I did a little digging and I found some articles around the web that you might find interesting. The short version is that the number of folks with brain lesions is similar in both people with migraine and people without. So, generally speaking, your risk is the same as everyone else's. Of course, each person is unique and their risk for stroke depends on a number of factors.
Here's an older article from us about white matter lesions on the brain, and then some newer things from other places on the web: