I might have just done the worst thing
What is it? Can you tell me more about that?
I met a girl in a bar and then took her back to my home where I raped her...
Committing a sexual assault against a person that you met in a bar is a very wrong and illegal act. The person who was raped will require a lot of mental health treatment to overcome what was done to her. You should turn yourself in to the police and confess to your crimes to atone for your actions.
That was hard for me to say.
Thank you for admitting your wrongdoing, at least. What you did was criminal, so I hope you are about to pay for your time and compensate the victim so they can suffer just a little less.