Order virgin drinks??

Kaitlyn
I'm 25 and my husband and I have been TTC for just a few months now. I know you're supposed to wait a few weeks to reveal that you're expecting.. but when we finally do get the good news, how am I supposed to keep it from my friends and family until we're ready to tell? 
My main concern is that going out for dinner with friends is a common occurance for us and I'm not sure I could avoid the inevitable, "Ooooh - not drinking?!" accusatory comments.. Anyone been put through this third degree and lived to give some good advice?
Help!