the thought was created by a bullshit society. I think we put too much pressure on stuff like this. you are 19. I lost my virginity to a girl who was a virgin, it was a beautiful thing.... then we broke up and had sex with other people. i think you are stressing more about your virginity as an insecurity at this point and blaming your culture. Just tell the girl whats up and who knows, she may get excited that she can show you a thing or two.
and she's not a whore/escort just because she had sex...
Relax
You can have anything you want, but you can't have everything you want