Dear Mrs. George...
I'm so sorry for you, and truly hope and pray you are able to carry a baby to term. Please stay strong, and know that we are with you in spirit.
Jimmy mentions blood work...I'll just say it. If you haven't already, you need to be tested for Hughes Syndrome. The foundation is in London. Maybe they can help you-I know Dr. Hughes is in England, as well.
It's maybe a long shot, but you fit some of the profile (headaches, dizziness, and miscarriages) Read up, and check and see if you've been tested yet.