Will my smile and the numbness in my lip improve? What are the signs that the mental nerve is severed? (Photos)

I had a chin implant around 3 weeks ago. I am still numb in my lower lip on one side and numb on the same side of the chin. I think that the lip has improved somewhat as before I was completely numb in the inside and well as the outside and now I feel it is more the outside. The chin however has no change. I feel a look of tingling and burning sensations in the chin and sometimes the lip. I feel like these sensations have been getting worse. The numbness obviously effects my smile.