3 migraines in past 24 hours

It started out when I had to have a bowel movement.  I received no warning signs.  Went to the bathroom, took 3 advils after that, slept a couple hours and it was gone.  I was camping out when all of this occured.  about 2 or 3 hours later, I woke up to the sound of rain, so I got up to close the windows on my tent, and BAM!  All of a sudden, my head was pounding again.  I was taken to the hospital where they gave me an injection of dilaudid and phenergan.  I had vomited several times during this episode, also.  I was sent home with 2 prescriptions...1 for dilaudid, the other for phenergan.  I slept again for about 3 hours, and woke up with yet, another migraine.  I took a dilaudid, which started to take effect in about 20 minutes.  I slept, and feel ok now, but feel like I could possibly have another one.  I'm still a bit over-hung from the dilaudid.  Although I have a history of migraines, and had the whole work up several years ago, which it was determined that my migraines were stress related, NEVER have I had this many of them in a row, within the course of 24 hours.  Also, normally, when I get migraines, which is seldom since my divorce 14 years ago, I have warning symptoms.  With all 3 of these, I had no warning.  They were full force from the onset.  What do you think could be causing these?

If you were out camping, it could be that one of your triggers is a type of pollen from the trees or plants in your surrounding area. One of the worst migraines I ever had came when I was at a botanical garden in Montreal that featured plants that are not found anywhere near where I live. Another could just be the weather. If rainy weather is uncommon or a cold front brought the rain into your area, that could be the cause of it. I currently have a migraine that I've had since Saturday, which is when a cold front blew in. This is not the first time that this has happened. Also, could it be that you have had only 1 prolonged migraine in the past 24 hours? Mine last for days, sometimes a couple of weeks. I hope this helps!