2 weeks after surgery and my breasts and nipples are numb. Will the feeling come back?

Decrease in session to the nipples can occur. It can occur with the implant above or below the muscle. Typically this is just swelling around the nerve that has decreased sensation. This should return it within 3 to 6 months.

Sensation should gradually return to your nipples....it is rare to have permanent loss of nipple sensation.