It seems like a strange coincidence that you'd have learned about having tourettes in the past and suddenly you're noticing vocal ticks.
Are you by chance a hypochondriac at all?
You may just be looking for it and now you're noticing things and magnifying it alot because of your anxiety. Maybe.
i think you're probably just thinking about tourettes and you're worried that it might crop up again. so worrying about it is making it spontaneously appear! i'm sure you're fine.