Oh, goodness, ! Apologies for not replying to your post earlier!
We always suggest checking in with your doctor when you experience a new or worsening symptom, no matter how big or small. Your issues could be related to your MS, but it could be something else, so it's good to get it checked out, especially when we're talking about heart/chest issues.
I hope you get to the bottom of what's going on and maybe even get some options for treating or managing the issue!
Best, Erin, Team Member.