I thought, by its very nature, progressive meant more symptoms as time goes on. Unfortunately, it’s only the remissions you don’t get - not new symptoms.
Nevertheless, if anything new happens that you’re not convinced is related, it would be wise to get it checked out.
I don’t want to frighten you, but a former regular here (don’t think anything’s happened to her - she just no longer posts) once said the commonest cause of death amongst MSers was ignoring something important, because they assumed it was MS.
I’m not sure how true it is, but certainly food for thought.
I’m the worst person in the world for taking my own advice, because since I was diagnosed, I assume every damn thing is MS, and hardly go to the doctor about anything. But there’s always the chance I’ll eventually get it wrong…
So if in doubt, check it out!