M.-
I FEEL YOUR PAIN!!! I was also in school with my most recent pregnancy (finishing law school & taking the bar exam), and I also have migraines. I have had migraines for years, so they were not pregnancy-induced as you say yours are. I won't lie to you, there is just a miserable amount of pain associated with migraines during pregnancy because you are so limited on what you can take - and it's even worse if you choose to breast feed. And, most of the medications you're allowed to take are pretty much the equivalent of rubbing an aspirin on your forehead. But, here's what I did...
1st - get your eyes checked! I did not know this, but pregnancy can drastically change your eyesight which can induce major headaches and lead to migraines. this is what happened w/ all of my pregnancies, and getting a new prescription really helped take the edge off.
2nd - I get really bad vertigo w/ my migraines, so I took Meclizine for that alone. My Dr changed the dosage, but I still needed it.
3rd - I was allowed to take Butalbatol while pregnant, but not while nursing. This is for the migraines themselves.
4th - find a good chiropractor. I don't know where you're located, but if you're in the NKY area, I highly recommend Dr. Matt Hogue in Crestview Hills. His # is ###-###-####. I think he charges $35/adjustment with therapy now, but you'd need to double check that. I've been seeing him for years, and he helped me throughout my pregnancy.
I hope this helps. I really do feel for you, but it will pass. Good luck.
- A.