Oy, mama, yan ay importante talaga, please check with your OB or go to the clinic para ma-assess nang maayos, lalo na kung may pain sa balakang. Di ko dapat mag-diagnose, pero yellowish or white discharge plus balakang pain ay kailangan tingnan ng doctor para sure tayo na okay lang. One of my mum friends had something similar at advised agad ng OB niya na mag-come in, so better safe than sorry, 'no? Anong stage ka pa lang ng pregnancy mo, or is this postpartum na?