Smelly Fishy Discharge

Hope someone will notice my post. Im 16 weeks preggy, and nagdo-do pa din kami ni hubby once a week or minsan lumalampas ang 1 week na wala kaming contact. Last time na nag-do kami napansin nya malansa daw ang discharge ko. Im worried na baka makaapekto kay baby although wala naman akong ibang nararamdaman. Should I call my ob na ba?