Positive Covid at hospital but negative when I got home?

Allyster

I’ve only been in the hospital for 1 day after giving birth and they told me I tested positive for Covid. I tested at 10:45pm on 12/29 and delivered on 12/30 at 2AM. They said I’m positive and wouldn’t let me retest and the nurse was very rude about it. So everyone in the family that I’ve been around tested and they were all negative. No one is showing symptoms and i have no symptoms as well. We don’t even go out or be around anyone. I just came home and took 2 more tests myself and it all came back NEGATIVE! I’m so confused I think it was a false positive.