Hi there,
A second medical opinion is the best idea. And I would tell your doctor, despite your age, that you suspect MS. All they can say is "that's ridiculous", or "that's crazy". Would be better to hear that response than let it go unknown. Like previous posts, we have no way of knowing. From my own experience, and what I've read, MS is usually pretty "well known" when it first rears it's ugly head. If the D3 is working, then keep that up! Again, talk to your doctors, they are the only ones who will be able to confirm or deny your thoughts about
this disease. Best of luck to you. And keep us updated, I am curious of the outcome