Sayang, chest pain + discharge dari nipple especially yang macam ni lama sangat, please go and see your doctor or go to your clinic asap, okay? At 31 weeks ni better to check dengan professional, bukan main-main. I know it's scary but pain yang spread ke belakang and prolonged like this kena proper check. Could be banyak benda je, tapi doctor je yang boleh assess properly. Jangan tunggu, especially dengan discharge tu, better aman daripada sorry lah. Mana your nearest clinic or can you go to hospital today? Let your husband or someone tahu, in case you need someone to drive. Sending you love, update me once you've seen someone, okay?