In above said condition, I suggest to undergo one blood test
for beta hCG
& TVS scan (around 4 weeks) at the earliest to confirm/ exclude conception product as brown to bright red color vaginal bleeding with late period may be sign of early miscarriage
After that, you should consult with your doctor for suggestive measures according to test reports.
, take healthy diet with more vegetables & fruits and maintain genital hygiene properly.
If you need further consultation with me, then you can visit http://www.healthcaremagic.com/doctors/dr-soumen-patra/63326.
Be well & take care.