Ay, normal lang yan, mama! At 1.5 months postpartum, meron pang lochia (postpartum discharge) na pwedeng lumabas, especially pag active ka or nag-breastfeed ka. Brown color usually means old blood na, hindi fresh bleeding, so that's okay. That metallic smell though, a few of us moms experienced that din, it's from the blood, but if it starts smelling really foul or nag-increase ang discharge, check with your OB na lang para peace of mind, kasi gusto natin siguro walang infection. How's your energy levels and recovery overall?