Finding it harder to hide

So my husband and I decided a while ago we wouldn't tell people (except our parents) until after week 10 or 12. Unfortunately, I'm getting symptoms that scream pregnant! I'm nauseated and tired all the time. I've also changed my eating habits, so people keep asking me if I'm pregnant. They did that before sometimes when I didn't feel well, but it's a bit hard to lie, especially because I can't wait to tell people! It kills me to have to say, "no that's not it."