C.K.
I had SPD after delivering my baby. I had the pain during pregnancy, but they said it's common. Sure enough my pubic bone separated and twisted after the delivery. Cannot walk for few days !
Then I went to physical therapy, specialized for woman. The therapist told me that I should do it during my pregnancy. She treated some of the pregnant women as well for the same symptoms. I wish I knew that earlier and spare me the pain. PT helped tremendously.
I also went to the chiropractor during my pregnancy. He helped me aligned my bones and spine and help me endure my expecting months.
Treat it as soon as possible with chiropractic alignment and/or physical therapy. It will helps a lot and let you enjoy your pregnancy.