Vaginal smell

I've been having this smell (a not good smell) from my vagina.

I had my daughter 2 months ago, and we didn't wait to have sex for very long after (she was 10 days old when we had PP sex)

We thought it was because of the soap I was using, I'd use scented soap, one day one kind, another day switch kinds,

So I bought some vagisil PH balance soap.

I am now on the pill & he does cum inside of me - if that makes a difference in your answer

I also only shower like every other day, otherwise my skin gets dry & I don't like to wash my hair every day.

Anyone know what this is? And how the fuck to fix this annoying smell!!?

EDIT: I am ovulating today as well. But it's not always when I ovulate, sometimes it's just on a regular day.