thank you.. i no i havnt got an std iv been with my boyfriend 2 and a half years and only ever had sex with him and we have both been checked for any stds so i no its not that.
the brown blood could be nothing more than old blood.
as far as pregnant...depending when you ovulate yes, you could be pregnant. any time you have sex you run the chance of std's and pregnancy. sperm can survive inside a girl's body for up to 5 days waiting for an egg to be released.