[shimmeringfaerie]

She doesn't need to take a pregnancy test. Yes, there is a chance that her birth control could have failed. But it is a very, very small chance. And unless she has missed her period, there is no reason to start worrying her unnecessarily. Is she supposed to take a pregnancy test every time she has sex, even though she used contraception? That would be expensive, stressful and entirely unnecessary.

Monica, when is your period due? If you don't get your period, then I would be concerned and would think it worthwhile to take a pregnancy test. However, there is no point in stressing yourself out until that happens.