If you really want a baby and the doctor says there is no issue for you or the baby I would go for it. No one can predict the future. I personally did not have children because of genetic issues not related to MS. Also I did not want a child as they grew up to have a disabled mother and possibly become a caretaker. I was worried about how expensive my illness would be. In my case my MS has not costed much or progressed so I guessed wrong.
It turns out I have the rare genetics for a bad cancer called BRCA, I did not know about when I got my tubes tied. I am glad to not pass that on to another generation.
The point is no one knows what the future holds for any family so if you want a child have one.
Alex
Welcome to this community. We are a group of people both diagnosed with MS and undiagnosed, but not medical people. As what you are contemplating is a fairly major decision, even for the healthiest of us, my advice would be to get some advice from your MS Specialist and/or an OB/GYN to be on the safe side. That said, there are people in this community who have had babies in their 40s and coped ok.
Best wishes with your decision
Poppy