In above clinical presentation, I suggest you to undergo a blood test
for beta hcg & USG lower abdomen to confirm intrauterine pregnancy
as brown reddish vaginal discharge
may indicate implantation
bleeding. Sometimes, early pregnancy test may give negative result.
In exclusion of pregnancy, you may need to do some investigations to rule out other pathology like thyroid profile & other hormone assay etc. Consult with your doctor and take suggestive measures.
Avoid stress / anxiety, take healthy diet with folic acid
& vitamin supplements, take adequate bed rest 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.
Take care yourself.