Me and girlfriend, we had this dry humping session on the 21st of October. After which on the very next day, that is, on the 22nd October she had her periods. But then, she has been 7 days late for her periods. I'm so worried and it has been traumatizing for me to focus on anything because of the possibility of pregnancy. I'm very worried because she is fatigued and has had a cold and now she is facing a slight back pain. Is she pregnant? What do I do?