Mama, brownish discharge at 36 weeks can be normal sometimes, a few of us experienced that too, but honestly, kailangan mo talaga ng check-up with your OB asap to make sure everything's okay, especially kung may bleeding involved. Better safe than sorry na, lalo na konit's something you haven't noticed before! Let your doctor check kung ito ay just old blood or something that needs attention, and don't wait kung may fresh red blood pa or cramping.