Aiyoh jangan takut, first time mummy memang confusing kan! Brownish discharge boleh jadi few things, sometimes it's just old blood mixing, or bisa juga show (mucus plug), tapi since you're worried better check with your doctor or midwife cepat-cepat to confirm how far along you are and whether labour signs are starting. One of my mum friends thought hers was the real thing, turned out still few weeks away, so better safe than sorry especially first pregnancy!