Me and my girlfriend have been together for about 8 months now and sexually active about 2. She lost her virginity last month. But we have always used condoms. And none have ever tore. After we are done we usually double check the condoms by filling them with water after wards. There has never been a quirt or anything out of them. She is a little worried because she is still waiting on her period to come. I think she might be stressing alot, which might delay it also. Is there a chance she could be pregnant?