overreact
verb
[ əʊvərɪˈakt ]
• respond more emotionally or forcibly than is justified.
• "the Authority are urging people not to overreact to the problem"
Similar:
get upset over nothing,
react disproportionately,
get overexcited,
go too far,
act irrationally,
lose one's sense of proportion,
exaggerate,
make something out of nothing,
go over the top,
Opposite:
be impassive,
be cool,
