Foul smelling discharge at 29 weeks

So I nearly had a miscarriage at 15 weeks so the doctor surgically sealed my pregnancy with a shrodka suture.so a few weeks down the line I started discharging foul smelling after sex only bcz that stench is far up in my vagina that it only comes out after sex wth my husband how do I deal wth it please help I tried anti biotics not helping,please help guys