Catholic Christians are permitted to marry non-Catholic Christians if they receive a dispensation to do so from a competent authority who is usually the Catholic Christian partys local ordinary; if the proper conditions are fulfilled, such a marriage entered into is seen as valid and also, since it is a marriage

Is it wrong to lose virginity before marriage?

And that answers your question: no, having sex before marriage does not make you a bad woman. We need sex education, and we need to normalise the conversation. Lastly, though Ive used it here liberally, Ive always had trouble with the term “losing virginity”.