3 weeks post deep plane face/neck lift--mouth stretched and pulled down. How can I fix this?

I had a longish upper lip and minor marionette lines. My surgeon said that the lift would improve the downward turn of the outer lip corners and, for the first couple of weeks post that seemed to be the case. But now that swelling is reduced, the opposite has happened, with the mouth appearing more downturned, wider and altogether lower on my face. My previously squarish jaw is now 'v' shaped, adding to the unattractive width of the new stretched mouth. When can i fix this(bullhorn/valentine)?