Hi,Non infected vaginal discharge is normal from the age of puberty to menopause.Needs to be treated only if infected( foul smelling,curdy white/greenish yellow in colour,associated with itching).Usually non infected vaginal discharge if not exposed to sexual activity. At the time of ovulation(mid cycle),vaginal discharge is more and blood stained. May be you are having ovulation discharge.Check with Gynecologist once.