Is it possible to pass MS to my baby in pregnancy?

No. Women with MS who wish to conceive can usually do so. Coordination of her care with her OB and neurologist is recommended. For more info i would suggest the following website: http://www.Nationalmssociety.Org/living-with-multiple-sclerosis/healthy-living/pregnancy/index.Aspx.
Rather low risk. Ms genetic risk involves susceptibility genes, and the risk from mother to child ranges about 3-5% at most. Do not worry, even if your baby had the unlikely chance of ms, as the new treatment breakthroughs will be more than sufficient in controlling those with future ms. Stay positive, and keep yourself healthy.