I've has some face numbness too. About 9 years ago when I was pregnant with my youngest I got bells palsey. It was horrible. Sometimes I get afraid that it is happening again. Thank goodness it hasn't yet. Knock on wood!
I think your twitches are the result of a nerve being damaged along the way. I got a lot of face twitches when I was having all that face numbness, and my right eyelid was drooping. Now I get back twitches.