We planned this pregnancy so i knew at 4 weeks i was preg and we told our families straight away, im very close to my family though, DP's family more or less found out he didnt really tell them. lol
But if you prefer to wait then just wait, drink raspberry and tell people its vodka and raspberry or just tell them you havent been well and your on medication thats your not alowed to drink with.
Good luck and congrats, only 33.5 weeks to go. lol