I feel like I wasted everyone's everyones time!!!

OK. The other night, my sister and I had a craving for some food from the local gas station. It was late at night, and right before we pulled into the lot, our favorite song came on. We pulled a little out of the way to hear the end of the song, and noticed a car in an adjacent lot, door wide open, and an old lady slouched across the wheel. We pulled over, beeped the horn, flashed the lights at her, but she didn;t move!!! We were too scared just to go over to her. We called 911. Turns out it was just a homeless lady, getting some rest. She was OK, and everyone just left her alone. Now, I feel like a fool and that I wasted everyones time. I mean, they sent an ambulance, the police, AND a firetruck!!! What would you have done and did I waste their time?