virgin and CD52?

Freaking out over a skipped period here. I feel perfectly normal, aside from the anxiety and additional stress this has generously brought upon me. Never had sex, though might've come into contact w pre? But fiancé never came in or near my vagina, especially during fertile window. I'm not TTC, I'm extremely apprehensive ab that and I'm super cautious bc it scares me and I'm definitely not ready for it. Any help?