BV while pregnant, help

I'm 20 weeks pregnant and I finished the medicine prescribed to me to get rid of my bv but I still have symptoms? If anything I feel like they've gotten worse...My boyfriend and I tried having sex and it burned afterwards and I even got some light pink spotting afterward which already stopped but I'm hoping doesn't mean I'm losing my baby. I'm so scared still.. I'm calling my doctor in the morning. Has anyone had this