Since chronic pain has not been a major part of your MS in
the past, I would say it sounds like what I have....MS&Aging.
Of course you being young enough, almost, to be my DD, it's
not as much for you as for me, but some women start to age
earlier than others. I've always been a late bloomer..

Like my DH used to say, the 'itis boys are after me again ...
Arthur and Burrs..