Someone on the team asks, "Is something going on?" You know more than you can say. "Nothing is going on" is a painted wall. I see a third option between telling everything and denying it, and it takes three sentences.

You walked in with the sentence ready, then heard yourself soften it. That is not lost nerve. It is a second job that starts the moment you are watched: say the sentence, and watch it land. Here is why the voice softens under observation, and one move I use myself.