Accident Hit Someone W My Car

Hello, last night I was backing out of a parking spot when i turned sharply while backing out. There was a pedestrian in the parking lot that came out behind a wall at the last second and i accidentally backed into her while she was walking. It wasn’t a hard hit at all but she did fall over. I felt horrible about it. I got out immediately asked if the lady needed assistance and began to apologize and i took full responsibility and they refused assistance. she took a picture of my plate and when i asked if they needed anything from me. They told me to just get out of there. She was able to walk away but seemed unsure if she was hurt or not. Looking for legal advice on how to proceed and what my options are in case she is hurt?