Baby pouch

How long does it take to lose your belly pouch after having a baby. Mine is little big. My hips and thighs are huge. I never seem to get rid of it. 5 months pp. I don’t fit into any dresses. Everything pops out :(I have started running 6mi/week ( when my baby is asleep) Does it help? I don’t want to spend time at the gym. Any suggestions or your experiences.