Face numbness
Usually temporary facial numbness occurs after face lifts. In my opinion your numbness could be related to a tight bra strap or placement of neck/face during your surgery among many unknown physical factors. These should all resolve with more time. Please keep a close follow up with your board certified plastic surgeon.
I do not agree with a previous expert poster , positioning in an augmentation could caused facial numbness! I think you are having a reaction to anesthesia or a medication. Call your surgeon ASAP!