Virginity: The Virginity has different meanings. In some situation, it is the condition in which either a man or a woman has even not been touched by opposite sex person. In some societies, the word Virginity is used if there no sexual intercourse has been done. In your case, unfortunately the virginity is lost!

Hymen: At this moment, it is difficult to assess whether hymen has been ruptured or not. Hymen is a thin layer that could even be ruptured without intercourse, or in some cases it could not be ruptured even with harsh intercourse.

Pregnancy: This is unlikely if the offender has not discharged inside the vagina. Precum drops that emit from penis prior to ejaculation may contain sperms that could produce pregnancy. However; in order to get pregnant, there are several things that are required to happen. Therefore; this is less likely that the halfway intercourse would bring pregnancy.

Repenting: This is good that you have forbidden him to proceed further. The Satan is always there to misguide people. Pray to Allah and ask Repent. Never disclose this fact to anyone. Forget what has happened with you.

Disconnection: Disconnect your relations with your cousin. In Islam there is no way to even talk with someone who is na-maharam no matter if he is your cousin or not. In My Opinion, Cousin's relations are far dangerous than any other unless the marriage has been done.

In the above case it is difficult to know from where the blood came if it is not from vagina.

As I already told you, hymen can be ruptured even without intercourse. Therefore; the criteria to judge the virginity by seeing blood on the wedding night is against the latest scientific facts. Unfortunately in our society still some people consider it.

You should not be worried in this regard. Every thing will go fine.

You have to tell her that you noticed bleeding and you are confused about your hymen.