I had CK, and also expected any weird effects to happen much later, based on what I read.
But for quite a while after i was having odd effects, off and on for the first 6 months, then they paused, and then again at 9 months. At the 9 month mark, it was significant. I could watch my eyelid twitch if i sucked on a straw, the 'numbness' in my face was all over the place. Odd headaches but quick.
I just had a MRI and all looked good (AND then the symptoms died down). My dr said it probably just the nerves scarring and healing. (And i think stress dials it up).
Here is my non-medical commentary. About 20 years ago I was shot (long story) and had a bunch of nerve damage in my right shoulder. As the nerves started to heal, which took a long time at least 18 months, there were a lot of very odd feelings. Some sharp pain, other weird feelings. It was odd. Eventually things went back to normal. I have to keep reminding myself of that experience.
I suspect others may have better insights than I do.