Mama, please go to your OB or the nearest hospital ngayon na to get checked, any bleeding or brown discharge in pregnancy needs to be seen by a doctor right away, okay? Hindi kami dapat mag-guess dito, kailangan talaga ng professional. I know it's scary, but the doctors need to check what's happening para sure ka na lahat is fine with you and baby. Go now, don't wait, better safe than sorry, lalo na yan 5 months ka na. Sending you strength, sis.