Lady accused me of tapping her car...but i don't think i did!?

today i was trying to find a parkin in a parking lot in my town, and quickly saw one and maneuvered into the spot. the spot was wide and had two cars on either side. i wasn't properly lined up, so i began backing back out to readjust when a lady in a parked car on the right side gets out and starts examining her car. i had no idea why, so i kept on driving and smiled at her. then she signaled to me and said "i think its alright." i had no idea what she was talking about so i proceeded to pull into the spot and park. then she looks again at her car and i roll down my window because now im suspicious. she then comes to my window and say "i don't see any damage its fine." it was then that i realized she thought i tapped her car! i swear that i never did! I NEVER felt or saw or heard a thing! i was just like "im sorry im glad nothings wrong." and she kept looking at me funny. I didn't tell her I didn't think I did anything because I'm 17 and a new driver so she might think I'm inexperienced and ridiculous. But i was nowhere near her car so I have no idea what is going on. I'm paranoid now shes going to find something wrong with her car. I don't know if she took my license plate down because I just proceeded into the store. And she lives in my town, so she might know my parents, who i didn't tell. My car has no damage, and I swear on my life that I did not touch her car!