Here, you need to undergo one home pregnancy
test to check pregnancy status. Brown discharge is mostly associated with implantation
You can undergo one TVS scan or blood test
after 1 wk of missed period for confirmation.
Following above test report, you need to consult with gynecologist for next line management. Till then, take healthy diet, drink more water and maintain genital hygiene properly.
For any query, you can directly ask me by viewing my profile. Good luck.