Talk to Gynecologist on Baby Girl- Vaginal Discharge

My baby girl is 4 months old since a month she keeps having tiny amounts of fluid in her vagina everytime i wash her there’s some milky/clear discharge! Initially when she was born, she had it in alot of amount in her 2nd week then it subsided on its own but now it’s not going away since a month. I’ve got her checked with a paediatrician but he said that breast fed babies are 90 % safe from any infections and since she doesn’t have any other symptoms so it’s fine. However I’m worried as it’s been too long and she’s continuously having it so what could be the reason. I take proper care of her hygiene and change diapers every 4 hrs. I have pcos could it be anything because of that?