Uy, that's something you really need to check with your OB agad, ha, don't wait! Brown discharge can mean different things at 39 weeks, and only your doctor can tell what's happening with you and baby. A few of us mums experienced spotting near the end, pero iba-iba ang reasons, so hindi dapat mag-assume. Go to your clinic or hospital today if you can, or if it gets heavier or may cramps, go to emergency na. Your doctor will know best kung malapit na talaga ang labor or kung may kailangan i-check. Stay safe, mamsh!