What!!! ********, if you went for an extended period of time without having anything in you, an then you got fingered very roughly chances are you just tore some tissue inside. But since these people already freaked you out, go ahead an get tested, an judging from you post I am confident that it was just tissue bleeding from the rough fingering.
Vaginal discharge could be from stress, change in diet, UTI.. Many things OTHER than an STD!!!
You will not always have symptoms if your are infected. Your friend could be right about it being chlamydia. It is known as the "silent" disease because the majority of people do not show signs or symptoms. Some symptoms women experience are vaginal discharge, a burning sensation when urinating or pain/bleeding during intercourse/penetration.
Your safest bet is to get check out by your doctor. If it is chlamydia, and you do not get treated for it, it could cause a lot more serious damage to your body.
you probley have an STD . or if he was doing it really hard to you he could have tore something or cut something and you may not have felt it.