Okay, I have never had a wart any where on my body. And Thank you so much this helps a lot!
As far as I know it's hard to pass along an std to a baby, though HPV is a tricky virus. The doctors probably would have noticed it. Perhaps your vagina has changed in physical appearance after giving birth. I never noticed any of those little bumps, they are called "papilla" I believe, until I had a doctor mention them. Then I was all "what??? What's that?!?" but I've been looked at by a bunch of doctors who always say they are normal. If they get bigger and/or start to look like clumps or cauliflower shapes, then you should ask your doctor about genital warts. Even if you have genital warts they are treatable and a lot of times don't reoccur if you take of yourself. If you had hpv, you wouldn't know it unless you had the kind that causes warts OR if you had an abnormal pap smear.
Just to let you know, when my mom was pregnant with my brother, or maybe it was afterward I can't remember, they found that she had a lesion on her cervix, so they had to cut it out. Back in the day HPV wasn't as heard of but it still existed and caused things like lesions, where if you hadn't gotten pap smears to check for things like that you wouldn't know. I guess she just wasn't careful about getting screened. Luckily they just cut it out and she was fine ever since. My brother does not have hpv, at least not from her, and nor do I.
I don't think that is what it is though. I am not a doctor, so I could be wrong, but what you are describing sounds like what I was told was just normal skin papillae...you can find some pictures online, sometimes they even show comparisons to HPV warts because people worry that is what it is. But I have a feeling that it's just normal skin down there...and if the doctors didn't say anything about it, then it most likely isn't HPV