Good job on how you handled that situation. And congrats on quitting drinking. I quit drinking a month ago and I'm feeling better. I think you handled the people pressuring you at the party very well. I haven't had to face that type of situation yet, but I think I will say I can't drink because of a medication I'm on or that I'm driving and don't drink and drive.
It feels good to wake up with no hangover, doesn't it?!
Take care.