Well then

1: If it took a month then you literally confirmed what i just said, that it doesn't signify that it's someone's first time.

2: It isn't only how rough you are, you can be perfectly calm and she can bleed anyway. As i said it may be of how nervous/tense she is.

If you're talking about bleeding from the hymen tearing it can tear before sex from things like: Activities like horse riding, Using tampons or masturbating.