In a preview clip posted to the show's official website, she tells fellow camper Jorgie Porter that she's having a "low day" and even goes so far as to say she doesn't want to be there anymore.
She tells the Bush Telegraph: "I woke up this morning, and I sleep with the canopy over my head, and I was awake for a long time, and for the first time I just thought, I don't want to come out of my little canopy. I don't want to be here anymore."
Tensions reached boiling point in camp last night when Lady C, Kieron and Chris returned from the Bush Hotel to main camp. They weren't happy with Tony and Jorgie for refusing to help with the Hotel challenge and everything kicked off.
The normally laid back Yvette surprised campmates (and viewers) by losing her temper with Lady C and telling her: "You are a rude, horrible woman at the moment and have a very nasty energy abut you. Be quiet. We are all sick of hearing your voice. Be quiet."
She later added: "This is ridiculous. We are adults! It reminds me of being in a school room!"
I'm A Celebrity continues tonight at 9pm on ITV.