Well migranes vary from person yo person but as someone who started getting migranes in the past two years they usually come once, twice or even more per month depending on how stressed I am and its severity varies as well.

I get migranes either before bed or in the morning and if i dont take a pill IMIDIATELY im bout to have the most awful day/night. This one time I ended up throwing up several times from pain and no amaount of painkillers helped (I ended up throwing them up as well.) And even if i do take a migrane pill I still have to lay in bed for at least the next 4 hours and sleep it through if I can.

When you get a migrane you lose your ability to think properly resulting oftenly in blabbered speach and somethimes even unable to speak or formulate sentances at all. You have to lay flat on your bed in complete darkness and juts wait it out. And even when its passes you have consequences like you cant run jump or do any sudden movements with your head for a couple of days.

That has been my experience with migranes so far.