How long does very lightly spotting last during bacterial vaginosis?

Hudsonmommy1417

My period is rolling in some time this week,but not real sure since I have PCOS.

Tonight when I did my first dose of flagyl gel. I noticed I was spotting blood. Very light,not enough blood to wear a pad.

I'm sure this is normal like the internet says,but just wanted to ask you before calling my doctor in the morning.