Is it from MS? How to proceed?

Relatively newly diagnosed so I'm still learning the ropes (about four years now). Recently, I noticed that I have been feeling "phlegm" at the back of my throat more often (could it be just allergies?) which then made me cough more (nope, not helping) and sometimes almost choking (on nothing). Now I am finding it hard to swallow, it seems like it's going the wrong way (up nasal passage). So very thankful for an excellent Neuro Team! Reached out last night and rec'd return msg with plan to do MRI to start (for lesion comparison-was due in a couple of months anyway). Anybody else been down this road? TIA PS: Definitely doesn't help with trying to stay hydrated. Ugh