In the US at least you can go to a hospital and have a "rape kit" performed, anonymously and free of charge, where the evidence will be kept on file should you

In the US at least you can go to a hospital and have a "rape kit" performed, anonymously and free of charge, where the evidence will be kept on file should you desire to press charges in the future. It's probably a good idea for any woman who has been raped to take advantage of that, regardless of what they may decide to do later.