I slept with my coworker and I'm pretty sure she hates me now.
Are you willing to hear her side of it?
I'm willing to listen to ALL of it
When you mix and mingle your love life with your professional life, it can cause unwanted and unexpected drama. Communicate with your co-worker and see if you can come to a mutual understanding so that you can continue to be professional.
Don't worry I won't be continuing our relationship anymore.
That's good but make sure you talk to her about it first. She could be feeling differently about your decision.