Kmg4, I would give it at least a week before the surgery, if not two. It is also good to coordinate that with the surgeon if it comes to surgery.
You can also donate blood now for them to freeze it for you, such that if surgery comes and you need blood during the operation, they can transfuse your own blood back to you. In the meanwhile until then you would have already replenished your blood.
Here is more on O-3 and anti-coagulation: https://www.youtube.com/watch?v=Jso_wbpXirg
I would also ask the surgeon for advice on using or not vitamin K as supplement before surgery.