How are you in general? How's your breathing?
I always have trouble gripping objects, but it's not impossible to grip at all, as you describe.
The only time I couldn't squeeze a doctors hands was right before my MG crisis. You can become weak so slowly that you can't truly know how weak you are, which is why I asked about how other parts of your body are.
It's a good thing you're seeing your neuro this week. If you get worse, you know where else you should be (ER)!
Annie