Is it time for us to switch day cares?

Little backstory: My 3 year old daughter just started going to day care a couple weeks ago. She's barely been apart from us her whole life, so it's been really hard on her. The day care is fairly large, so they're divided into a few different groups by age. I only really know the day care workers that attend to my daughter's group. All the groups play on different sides of the building. The side her group plays on is on a different side of the building than the side of the building with the parking lot where I park.On Friday when I went to pick her up, I parked in the parking lot, then got out of the car and started walking towards the building. Suddenly, I heard my daughter excitedly say "Daddy!" and come running over to me. A couple boys from the older group that plays on this side of the building followed behind her. They asked if she was my daughter. I said yes, and they told me that they found her playing on their side of the building, and that they didn't think she was supposed to be over here. I looked around and saw workers watching the kids, but none that I recognized.I brought her back to her side of the building, and spoke to the head day care worker. She told me that my daughter had gone to the other side of the building with one of the workers, who was watching her. I accepted this answer, but now that I've had time to think, I have a lot of questions. If someone was watching her, why didn't anybody say anything to me when I walked over and picked her up? Did the person watching her recognize me, even though I didn't recognize them? Why did the boys think she wasn't supposed to be there?Mostly, I'm concerned that she might have wandered off without anyone noticing, and that I was just being fed excuses. If that's the case, I find that quite terrifying. How long would it have been before someone noticed she was gone? Would she have made it to the road? Could someone else have been able to just walk up and pick her up? What would have happened if those boys hadn't found her?The problem is, this was also the first time that I have picked her up where she actually seemed happy. She told me about all the fun she had, and seems excited about going back. If we switch day cares now, she'll have to adjust all over again. So I'm considering pulling her out of this day care, but I'm worried that I'm overreacting, and that it's not worth the stress on her. What do you think? Any help at all would be greatly appreciated. via /r/Parenting https://ift.tt/2LqVx5l