yeap, that's what we did. We loss our first baby as well. I actually appreciated the sympathy, but it was hard to tell that we had lost the baby...worst, some people would come and congratulate me AFTER I had had the miscarriage because they didn't know what had happened...THAT was hard!
In any case, with this pregnancy, we waited until second trimester to tell people, and even then we did it little by little. Now I'm 22 weeks, and I just called a dear friend who doesn't live in the area to share the news. I'm just beginning to feel comfortable. At the very beginning only my mom and brother knew (my mom was visiting, and my brother was living with us at the time, so how to keep it from them, right?), but we asked them to tell NO ONE! and they followed through.
I read somewhere that IF you really have that urge to share the news, just tell it to a complete stranger, somebody you know you won't ever see again. It'll make you feel good! Also, a little acting is not bad

I agree with SilverAngel...I did similar things "no, I'm not drinking, I'm the designated driver" ...or "no, coffee will keep me awake!" ...or "my back hurts, I can't lift this, would you give me a hand?" etc.
If you get bad m/s say that you got the stomach virus or something. I could not stand chicken during my first trimester, so I would just say that I was trying to stay away from meats....ehhehehe.
CONGRATULATIONS!!!!