Advice Needed! Holiday parties and what to do?

I have my work party and a friend’s Christmas party coming up this week and I’m thinking of coming up with an excuse not to go. My husband thinks I can have a few drinks and disguise it. I don’t really want to drink, but feel I will get busted. I always have wine in hand!! And the weekend after Christmas, I’m sleighed weekend skiing with my husband’s family. I feel like it will be impossible not to tell them. He thinks it’s way too early to share the news, but his father and sister are doctors. I’m okay sharing with close family and friends, but he seems to think it’s a faux pas. For work, after the holidays, I’m going to blame no drinking on my NY resolution. It’s just the party I’m worried about. Any advice?