Pregnant with an abscess/fistula

I am pretty sure I have an abscess/fistula. Does this mean I will need to have a c-section or is it possible to have a natural birth? I have never had surgery for the fistula or anything like that. My Dr says she will drain the abscess after birth. After doing more research I have come to conclusion I have a fistula and will ask my ob about it next appt in 2 weeks. I am so confused and not finding answers anywhere. Has anyone expirienced this?