When will my lip return to full mobility after rhinoplasty?

I had rhinoplasty coming up to a month ago now and though I can smile pretty much normally, I can’t put my lips together as if to say ‘m’ or ‘p’. It’s still quite numb just under the tip of my nose and inside my nostrils a little too. I haven’t heard complaints of this kind of restriction from rhinoplasty before and therefore am just concerned that it’s normal and will go.