Who would you see for diagnosis?

In the last few months, I have gotten weak beyond belief. I even fell down the stairs this morning. When I finally got to the bottom of the stairs, i couldn't get myself up because of the weakness on both legs and arms. I have serious constipation. I do not have urinary incontinence but I can't get myself up from the floor and struggle to even get up off the toilet. I have urinary retention that has gotten worse requiring me to cath myself. My legs, especially my right one is completely numb but also has shooting pains. My vision has been actively getting worse related to always seeing double even though Ihave always had 20/20 vision. I struggle with swallowing when eating. I was online trying to figure out why I'm having this stuff and I literally have every symptom that is listed and it kept coming up with MS as the most likely reason and understand it could be a different diagnosis.

I sent a message to my neurologist/epileptologist and was told I should hear from them in the next several days to get checked but who knows how long it will take (since my son just saw the neurologist last Tuesday and the next available appointment was mid July).

So my question is, are there other providers that would be recommended. I can't keep being this way because I'm at this point I am getting extremely scared.