I feel like a jerk

So, I'm almost 7 weeks along, and my husband doesn't want us telling anyone. I saw my best friend earlier this week, and I couldn't contain myself. I told her, but I made her promise to act excited when we retell her in a few weeks. I feel awful, but I don't necessarily agree that we should be hiding it from everyone. She's suspicious anyway, because I've been saying no to sushi and alcohol, and it felt like such a relief sharing unbridled joy with someone. My husband is excited, but he's also very nervous, and it was so lovely to talk to someone who was only excited, and not nervous. My husband is suspicious and asked me today if I told her. He made me promise that I didn't. It's the first major lie I've ever told him, and I feel like garbage about it. I honestly just wanted to avoid the fighting. I feel like the stress is bad for the baby. Should I tell him? He told me that if he finds out I'm lying, he won't trust me and won't want to have anymore kids with me. Is this a big deal? I'm torn between feeling like I betrayed his trust, and feeling like I'm making a big deal over nothing (and so is he).