Sounds like we're in somewhat similar situations. And as you can see from my recent post, I don't have a whole lot of answers.
I would suggest you hold off on the pregnancy until you've had the run of usual tests, and it sound like you're almost done. I know it's frustrating to wait but it's important to know what you're dealing with.
Doctors generally prefer to start aggressive treatment immediately after diagnosis, because it is a such a critical stage. The good news is, pregnancy protects you from MS, so maybe your doctor will be okay with starting medication after you have your baby.
I hope things move along quickly for you. No one wants to find out they have MS, but at least an answer allows you to plan for your future. This forum is a great resource for information and support.