Sounds like a rebound migraine. I am diabetic, my ratio of when I went to ER was a tad different. I either when to ER when migraine on 1-10 scale (10 worse) was 6 or higher or when my blood sugar would hit 80. I dont eat or drink during migraines, hence why I keep an close ye on my bloodsugars.
Don't Care Bout Nuffin No More, Guess I shouldnt even be in this world