Can't Stop Smoking Before my Rhinoplasty, is 2-3 Weeks Pre-Op Enough TIme?

my surgery is on february 4th and my doctor told me I should atleast stop smoking a whole month before my surgery and after the surgery. I think I can handle not smoking after the surgery but I stopped smoking for just one day and I felt really depressed and bored. I heard that I should stop for atleast 2 weeks before the surgery but my doctor said I should stop for a month. so, why is it different with every doctor and what if I stopped smoking for just 2-3 weeks before my surgery,is it OK?