I just want to note that virgin girls can have fungal infections (yeast) or bacterial vaginosis. If your partner(s) have a yeast infection and you have unprotected sex, you are at risk for contracting the fungal infection that can turn into urethritis if left untreated, This is a very painful inflammation of your urethra. I am not saying that this is a possibility THIS time, but do keep this in mind in the future and never forget to wear a condom until you are in a committed relationship and ready to settle down to start a family.
Good luck hun
~VQ
Even though she was a virgin, you should have used a condom to prevent an unplanned pregnancy.
This is not uncommon the first time for a woman. Either there may be no blood, some or a lot.
I would recommend of course using a condom and getting some lubrication from your local pharmacy. This will make things much easier the next time for both of you.