Welcome to HCM.
As you were sexually active, pregnancy should be ruled out through home pregnancy test or blood test
for beta-hCG. Brown color blood may be due to implantation
bleeding or abortion or some sort of infection.
Following pregnancy test, you should undergo a USG lower abdomen to rule out miscarriage
or underlying pathology.
Hormone profile (TSH, LH/FSH, Prolactin, Progesterone
etc) should be done in case of negative result. You should proceed careful pelvic examination.
Check the test report and consult with your gynecologist. Control body wt, avoid stress, proper sleep and take healthy diet.
Be well and take care.