I am shocked your doctor said it's ok to smoke, even 3 a day, and still do a free flap. My doctor said even second-had smoke would constrict the blood vessels that need to be reconnected by microsurgery when they move the flap to the breast, and could lead to necrosis or flap failure. Why risk it? Even stopping for a few days could help, so stop today. I wish you all the best and success in your surgery.
Dear becca0350: Since you are looking from input from others, rather than a medical post, we will leave this up for others' comments.