Facial numbness on one side can be from MS. I would contact your doctor as he told you. When we question our sanity, the doubt can prevent assistance. In the beginning it will all be new to you, but in a short time, you will learn to know what is MS and what is not. There have been times when I have gone to the doctor and she has been able to see MS in my face, that is, one side was droopy- even though I had not felt the symptom.
Swallowing difficulties are part of my every day life. Since learning the practice here on these forums, I alleviate much of my swallowing difficulties with ice cold water to drink. In addition, there are some foods which I have given up because they either cause choking or they "feel" difficult to swallow.
At night I sleep with my upper body on an incline. If I do this, I have good sleep and no swallowing or choking problems at night.
As to the facial numbness, my doctor showed me that if I looked in the mirror and smiled, I would be able to "see" my numbness. My left side always smiles better than my right side- indicating my right side problem. Luckily the mirror does not break- yet!
So anything less than a broken mirror= Good News!!
BTW, you might want to journal this problem to test the persistence of the problem. MS symptoms are not generally fleeting. Even if the numbness appears to go away, continue the mirror check by making a natural smile- not forced. Note the right and left corners of your mouth.