Ok right I'm 17, yes I've had sex and so far my period is 4 weeks and 3 days late I do not know if I am prenant or not I need your help please some one. I do not have breast tenderness,sore back, haven't been vomiting, no morning sickness or anything and normally my period is on time if I am pregnant my dad will go mental so please.

Many many thanks tash xxxx

You need to take a pregnancy test, bottom line. Its better for you to know now than have a surprise come in about nine months. Please, take an HPT, using your first morning urine, as it is the most accurate. You could also ask your doctor for a blood test.

Your title says "brown blood".. where does that fit in?