My vagina smells really bad almost all the time. i would take a good shower and 30 minutes later, it would smell bad again. what is wrong with it?

Bacterial Vaginosis: If you have a new fishy odor with discharge the most likely diagnosis is Bacterial Vaginosis which can be treated empirically once full urine and blood sexually transmitted disease screening +preg test is performed. Vaginal swab also a great test but you need pelvic exam by OB/GYN to rule out other causes. ACOG lists new odor as an indication for a woman to seek OBGYN pelvic exam.

Bacterial vaginosis?: The main cause of strong vaginal odor, sometimes with discharge, is bacterial vaginosis, an overgrowth of mostly normal bacteria. There is debate about whether BV is considered an STD, but it's often triggered by sex, and other STDs (gonorrhea, chlamydia) are more common in women with BV. The STD trichomonas causes the same kind of odor. See a doctor for diagnosis, STD testing, and treatment.