Can Botox in the Forehead Cause a Numb Feeling in the Lips?

I had 14 injections a week ago in my forehead. Now, as it is taking effect, I'm also noticing a slight numbness in my lips - sort of like after being at the dentist and the anesthesia wears off but not wearing off. Can the botox cause this? I went to my GP and he said there's nothing in my mouth that's abnormal and that botox ''usually'' does not travel so far. What's your take? Thank you.