I just did a search about swelling tongue (which I should have done before I posted). If you're having breathing problems, you should go to the ER. This is to be treated like an emergency. I know you've been having symptoms for a long period of time, but if you're experiencing breathing problems this really is serious.
Deb
Erin, I have no idea. My gut instinct is that it's not related to MS. I wondering if you have an allergy to something you are eating or to a medication--especially with the shortness of breath. Your shortness of breath symptom is a concerning one. I would go back your doctor, pronto, and tell him that you're still having problems. Maybe you need a steroid shot or something. In the least, you need to get your doctor to look at what's causing your breathing difficulties. This sounds serious to me, but I'm not a doctor.
Wishing you a quick recovery--get an appointment ASAP!
Deb