You must be so worried, you poor thing. I havent ever hear of Bells Palsy before, but if the doc says it should be okay then thats good news. Understandably you would not be able to not freak out if your face dropped. It seems as though you have an honest and good OB there so maybe just try and keep in regular contact.
I will pray for you that it doesnt get to that stage. [-o<
Keep positive.