Do not make a knee-jerk reaction to the bad news.
knee-jerk reaction
idiomAn instantaneous reaction made without thought.
Origin
disputed originBy means of an elliptical reference to the reflexes of reflex arcs, in this case the patellar reflex.
The manager made a knee-jerk reaction to the low sales figures by firing the entire marketing team.
Rather than offering a thoughtful solution, the committee provided a knee-jerk reaction that failed to address the underlying complexities of the policy change.