Daughter Told Me Her Dad Touched Her

me and my ex have been divorced for 5 years. we have 50/50 custody and other than him being petty and arrogant i have no complaints about our current arrangement. last week, my daughter told me her vagina hurt. i saw it myself and it looked very red and swollen. shes 5 years old. i noticed vaginal discharge in her underwear as well. she told me her vagina hurts because her dad poked her in her vagina. she said no daddy, bad daddy, do not touch me. i immediately took her to the emergency room. i let her do all the talking and she told the doctors her dad touched her vagina and thats why it hurts. she said "his fingernail was sharp" zero coaching or prompting from my end, i was devastated and nauseous. she didnt want to talk about it in the forensic interview and kept changing the subject and talking about off the wall things. i filed emergency custody and a protective order for myself and her. her dad is unhinged and reactive and you cannot reason with him, so i didnt tell him anything and he knew nothing until he got served with the order. they dont have enough evidence to make an arrest currently. but i believe my daughter. the medical report highly supports my daughters story. im not the one making the accusation, im just doing what i feel is right and not ignoring what she said. im worried that her dad is going to accuse me of making it up to alienate him. but im not the one making the claim my daughter is. im unsure what to expect at this point, or whats going to happen to our custody arrangement when we go to court.

edit: yes i have a lawyer for the protection order. will be using the same lawyer if theres a modification