Mind racing everywhere

So I been with my fiancé for 5 years known him for 20 years dated back in the day he’s an excellent step dad to my 11 year old , we tried conceiving for 3 years and finally had our baby girl last December he’s such a good daddy to her literally treats her like his princess , our daughter was born early so she was in the Nicu for almost a month he has never wanted to change a diaper because of how tiny she was he was scared to hurt her now she’s 6 months and still he doesn’t change her diaper at all , well two days ago I left her with him while I went to the store to buy formula this is not the first time he has watched her alone , before I left I changed her diaper and I came back and they were watching her cartoons night comes and I go to change her diaper for the night and I notice 3 hairs inside her diaper and I freak out as they look like pubic hairs I wake him up and ask him if he tried to change her diaper he said no , I was thinking maybe he tried and his chest hair fell inside as he wears no shirt inside the house and he has a hairy chest , he said maybe they got in her diaper since she sleeps with us and he sleeps without a shirt well my heart is hurting because I know he’s an amazing dad and that’s never happened before but I’m also torn that maybe he touched her sexually even if there was no penetration I took her to the hospital and they said she looked like there was no trauma down there but if I wanted the hair to be tested I would have to open a case with law enforcement and I’m really divided because I know it’s something really serious if I do that well as I’m in the emergency room I changed her diaper and I noticed the pack of wipes have two more hairs inside not as thick but still there is hair and these are a new pack of wipes so now I’m torn if I miss judged him and the hairs are from the wipes and if so can I call the manufacturer idk what to think and I’m heart broken but I told him that I will no longer be leaving my baby alone with him I hate that I lost all trust these are the hairs I found and no there is no other weird behavior from him to ever make me think that I’m just so hurt at the thought and what’s real or not