Antibiotocs and probiotics

I'm taking flagyl for bv right now and the doctor told me i should take a probiotic as well, so i bought a bottle but i can't find anything about how many I'm supposed to take while on the antibiotocs. I'd rather not have to call as it was a walk in clinic that also does covid testing and seems to be short staffed.

Should i take the recommend dose in the bottle or after every dose of the flagyl?