I feel her pain. I had a few while pg and a lot of allergy problems.
1. find and target triggers--foods (onions, cheese/dairy in abundance, chocolate, diet soda -sweetners actually, bright lights and sounds like in a movie theatre, etc.)
Once you get a migraine these can actually feed it to keep it going for days.
2. ice packs. I put a small pack on my head and wear a ball cap to hold it there. The flat wraps they use for lunch boxes.
3. heating pad sometimes helps but not a whole lot.
4. quiet steamy hot bath--but she will have to be careful as she can do more damage than good. It is said to be bad for pg ladies to use hot tubs too long or too much.
5. massive amounts of caffine, but again you have to be careful as that can also be bad for pg ladies.
6. eating really well. I find I don't eat when I am in pain and that just makes the migraine worse.
It is like a vicious cycle to medicate it without neglecting something, therefore making it worse.