You think your character is overemotional and while that's fine - that dynamic really doesn't work with this AU in particular. In fact it doesn't work with even my Canonplay.
My trope is not your trope. Just because my character's reactions to things may seem out of character without the AU taken into consideration, doesn't mean your character gets to have an emotional outburst. That is not going to help someone who has been verbally barraged. You'll just make him/her confused.