I just wanted to reiterate what others have said - Poison Control doesn't call CPS, generally speaking.
I've had to call poison control for my dd 4 or 5 times and they've never followed up or referred us to CPS. She ate; a whole bottle of papaya enzyme, drank down some children's tylenol, I forget the other thing, and she brushed her teeth with a tube of white watercolor paint.
In all those cases they didn't have us go to the ER, so I know they don't tend to "overreact".
I hope she's OK!