Please help!

One of my friends lost her virginity last night. I'm afraid she might end up pregnant. She told me today that it hurt down there. She also made it seem like they didn't use protection. & as somebody as young as our age I'm not sure if that could mean something. The boy is a few years older - she says his "stuff" is long in length & thick. Could he have stretched her out a little too much?
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I'm fully aware that she wouldn't know if she was pregnant or not. I'm saying in the future.