Hi,,
I'm so sorry you are dealing with facial problems at such a young age,,, it's VERY hard at any age but I have empathy for you. You did have an extremely large AN and I'm quite sure you were experiencing extreme symptoms ,, so it is good you had it out. If the Dr indicated the nerve was just stretched or swollen and not severed,, you may see vast improvement within the next couple of months. It does take a long time, sometimes 12-18 months for the nerve to heal. Patience is what you need most! It's very hard I know as I had my nerve severed during surgery and a second surgery to graft the remnant to another nerve. That was 4 yrs ago this weekend. Now you can't tell to look at me that I have paralysis until I talk or smile. I don't expect to get either back but then my nerve is "patched" and yours is not so keep the hope!!
As far as electric stimulation,, it is not generally recommended,, but you can do light massage to your cheek area yo stimulate the muscles and help get tone back in the cheek area. I lightly rubbed up and outward whenever I thought about it to help keep tone in face. No one told me too,, so that's not "Drs orders",, just my suggestion,,,
,,also, try to smile and raise eyebrows and close eyes and "remind" muscles and nerves what to do. That can't hurt either. But nothing exaggerated or too forceful until you begin to feel tingling in face. You will notice one day that things are happening.
I wish you the best,, and try not to be too hard on yourself. I know that is easier said than done from experience,,,you have a grieving period to go through for what once was,,, but you must accept it and move forward,,, you have MUCH to do and MUCH to contribute still!!
Prayers and hugs,,
Jane