When I was pregnant they thought I had lupus, which since has gone to fibro, then MS. My neuro thinks it may have been MS all along.
Anyway, whichever it was, I went off all meds while pregnant because I didn't want to learn later on that the meds have an effect on my children. I felt absolutely great during the pregnancy. Just a little tired, but the excitement of being pregnant got me through that.
With my first I had a flare about 6 weeks postpartum as the hormones were readjusting. Lasted 3 days. With my second I went on a six week course of prednisone and avoided the flare.
Hope this is of some help. Have you asked your neuro and ob/gyn?
If I can be of any further help, I'm here for you.