I am so sorry to hear that the fireworks have triggered such a nasty attack! Are you feeling any better since posting this?Do you currently take any migraine medications?
In regards to fireworks as a trigger (in the future), some find using noise cancelling headphones to help in situations like this. One of our contributor's shares her experience using the headphones, which you can read more about here.
Let us know how you are doing when you have a chance! Take care.