Like other posters have suggested - I think this is an issue which clearly goes beyond "bear gate".
You refer to your child as "my baby", which, I suppose a lot of parents do about their youngest, but, given her age (she'll be an adolescent soon) and the fact you've said it publicly on a forum with no hint of irony (unless it was click-bait) seems rather odd.
I wonder if the issue here is that your DC's are growing up and you feel ever so slightly out of control about it and need to be in control of some aspect of their lives, however trivial? I am not judging you for this, I unfortunately haven't any children and imagine it would be hard to "let go".
It speaks volumes that your daughter knew that this would upset you, which means this is not an isolated incident.
It might be a good idea to speak to someone about your feelings about your daughter growing up if you are having such a hard time with it.
I think if it was just about the teddy smelling different you would have been annoyed for five minutes, chucked it in the wash and within a week it would be the same.
Your daughter will be a teen soon and if she's already trying to shield you or pre-empt your emotions about something so trivial, I think she's going to find growing up very difficult when she needs to come to you with something far more serious.
None of the above meant with malice.