Are they more common when your pregnant?

I am prone to getting the occasional mind splitting migraine, i was on my way to work yesterday and i started to get the fuzzy lines in my left eye and i ran home just in time for it to hit me big time. I slept all day yesterday, i woke up for an hour or 2 but it came back i seem to be ok now.

But do you think its something that will happen more often because im pregnant?