J.,
First off, Congratulations!
What you need to do is look for a Perinatologist. This is a Doctor who specializes in high risk pregnancies.
I would start by figuring out which hospital you are going to deliver at and then check your insurance for Perinates that serve your hospital.
Then you might consider posting the Doctor's you are considering using here on this site and see what kind of feedback you get from other moms.
I live in Oakland and delivered at Alta Bates Medical Center. If this is the hospital where you will deliver I would reccomend East Bay Perinatal It is a group of Perinatal Doctors that serve Alta Bates. I saw a variety of Dr.'s from the group and they were all wonderful.
Hope this helps and best of luck,
N.