Hi, I am a 17 years old and my boyfriend s and I s relationship has been going really well, we are over a year now and from Monday to Wednesday, we had unprotected sex. Two days though the minute I got home I washed off with cold water. Does that kill the sperm? Also, when will I, if I an pregnant, begin to see signs I an pregnant? I have a dance class at school and previously this year, a senior passed out while dancing because she was pregnant and didn t know. I just want to take the best precaution if, I am by the chance pregnant. Thank you