http://www.momtastic.com/pregnancy/741011-how-to-get-relief-from-sciatic-pain-in-pregnancy-without-using-medications/

Yes, chiropractors and physical therapists treat pregnant woman...for sciatica and many other lumbar and spine disorders. Chiropractic care is especially valuable in this setting as the desire to limit the mother and child from x-ray radiation exposure, drugs, injections, and other dangerous treatment options is shared by all providers.
Many women who are referred to me by obstreticians are surprised that chiropractors treat pregnant woman. 
Have you heard of this?
http://www.momtastic.com/pregnancy/741011-how-to-get-relief-from-sciatic-pain-in-pregnancy-without-using-medications/