There is a sexual misconduct response line. You can find the number online somewhere. It has tons of resources that can help. I wish I had known about this line. I only found out about it a couple of weeks after I reported. It has its own military police that can help. It has an option to have a third person, so you don't have to be in direct contact with the police.
Overall, it's a 24-hour helpline full of trained and registered nurses who can help you. I did it once, and she just listened to me cry for an hour and complain. It was so nice.
If you don't have that familial support, just reach out. Look at those little posters on the wall that nobody really looks at.