Bryce raped her without protection
What episode did Bryce rape her without protection
They didn't use protection in The Second Polaroid (2.04), The Third Polaroid (2.07), and they most likely didn't use protection the other times either.
But that's not how pregnancy works.
You see to conceive a foetus the couple must be having intercourse or "doing it" when the female partner is ovulating.
She must been pain after sex
She must been in pain after sex
More to the point, how did she find out she was pregnant?
How did she know was pregnant ?
She found out in the last episode right? In the bathroom of the ball/gala/prom thingy