Hi Nancy,
ANs can cause facial numbness when they affect the trigeminal nerve. It is not very common but it can happen, although usually with ANs that are larger than yours. In my case it all started by having a metallic taste, then numbness around the mouth (felt like when the dentist uses the novocaine injection before doing dental work). It slowly started to propagate and now covers much of the right(AN) side. Also causes dry eye, because of the reduced sensation in the cornea. Other than that I haven't had any other symptoms, and this is what prompted my family doctor to order the MRI.
The numbness has stayed the same after GK. Overall it is not that bad, I just wish that this is the only symptom that I will have and I can live with it.
Given that your AN is small, hopefully your numbness is not because of it, and you won't have any other issues.
Marianna