Suspicious?

Matt and I decided to wait a little while to tell people about the baby.  Last time family and friends knew when I was only about 4-5 weeks along.  Since the twins' pregnancy was such an emotional event for so many people, we decided that this time we would wait a little while to tell people so that we could avoid some of the high emotions at the beginning.
Of course, I'm not good at keeping secrets, so I have spilled the beans to a few people.  Let's see...my counselor (for obvious reasons), my trainer (again for obvious reasons), Dolores (she asked too many questions and I blabbed), Chiara (was nervous and wanted to tell someone), and Drew (he lost a baby right after we lost the twins, so I thought he would understand).  I don't want to tell anyone else, but I think some people are getting suspicious.
Nadia has asked a few leading questions lately...like have I been to the gym lately?  Have I been watching what I eat?  Why am I so possessive of my French fries?  hmm...I wonder if she thinks that something is up.  My gut is getting round (yes, this early), but I just look a little heavier right now.  I'm not sure she would actually notice that it is a baby belly.
I think we are going to tell people in a couple of weeks, but I just am not sure how to say it.  Before it seemed easy.  I was excited and I just told people.  Now I am a little nervous to say it.  People are going to be happy for us, but I am afraid they might be worried, too.  I am trying to keep this pregnancy negative-vibe-free, so the less people that know for a while the better.
Now if I could only learn to keep my fat mouth shut.