You'd be surprised how much people can be oblivious to. Both of my parents knew I was large chested from having to buy me bras forever, but never noticed or commented when I started binding, which I did for roughly eight years.
Top surgery is a bit different. Especially at just 4 days post-op. I'd be more concerned with hiding the fact that you've just had surgery than what kind of surgery you had. I was good to go, back to wearing normal clothes at a week post-op, but that's not the case for most people. Christmas and Hanukkah both start in less than ten days. New Years is a little over 2 weeks away. You're still going to be pretty fresh for all of that. I'd worry about feeling up to holiday festivities. I hope if you have drains they're removed by then.
I'm fairly open about what kind of work I've had done when people ask. But people really only ask when my shirt is off.