Hi Freesia, welcome back, nice to hear from you.
My short DX is that it's MS and my 2nd DX is that you worry too much.

If it's MS, stressing out about it is only going to exacerbate your symptoms.
Also, an illness and/or infection will trigger old symptoms and may even cause new ones.
Take a deep breath, get over your illnesses and stop worrying. No hurry in getting a DX, as long as they've ruled out the bad stuff. The meds for MS are not that darn reliable anyway and some could do harm.
Feel better soon..
P.S. Get some LDN..