Bacterial vaginosis

Anyone ever have issues with bacterial vaginosis during pregnancy? How were you treated? Doctor called me today to tell me I had it and gave me metronizadole gel for 5 days. But he also mentioned how it’s not overly studied about preterm labor and second trimester loss... but i read it could happen... any helpful input to help give this FTM a piece of mind would be great. 17w1d