You could have a discharge from a STD; discharges aer common with some STDs.
No. It is a discharge, more likely to be an STD. It certainly does nor indicate pregnancy. Should you be experiencing such you should seek medical attention.
Yes, this is normal. Your vagina is still "cleaning" itself out. The brown discharge is just old blood. Gross, I know, but it's totally normal. If you have brown discharge for more than a couple of days, I would see a doctor about that. Abnormal discharge can be a sign of an infection or STD.
Metrorrhea
urethrorrhea
Urethrorrhea is an abnormal discharge.
pharyngorrhea is the abnormal discharge from the pharynx.
A penile discharge after contracting an STD
-rrhagia is the medical terminology combining form meaning discharge of blood, as in menorrhagia (heavy menstrual flow). A related suffix, -rrhea, refers to any kind of abnormal flow, such as rhinorrhea (abnormal nasal discharge) or otorrhea (abnormal ear discharge).
Pharyngorrhea is abnormal discharge from the pharynx.
Are you on a form of birth control? With certain birth controls women have reported abnormal discharge. Other than that, or if it is close to the start of your cycle, it is not normal to have bloody discharge. You should make an appointment with your OB/GYN doctor to have an STD test and also a pap smear to ensure this is not due to a serious problem.
Bleeding or abnormal fluid discharge from the spleen.
It is impossible to say on here what your brownish discharge is, you need to go to a doctor or clinic. Also there is no such thing as JUST an STD.