i know what you mean. i've worked out events in the upcoming months where i can avoid drinking alcohol and at my week 9 i'm stuck, no excuse. will have to tell parents that weekend i think.
lol, you could always find an excuse for why youre not drinking if you wanted to, youre just bursting to tell someone.
I told my relatives at 5 weeks and close friends about 7 weeks but as i said personal choice. Then most people worked it out themselves once i ballooned at 14 weeks lol
Secondly I wouldn't tell anyone until you passed the 12 week stage - for an excuse to not drink maybe say you're on anti-biotics? Or you're on a diet as a last resort? Or even you're driving?