Does anyone else shut down when too much happens at once?

Sometimes one unexpected message, a change of plans, or several things happening at once can push my brain into overload. I start imagining everything that could go wrong. Then I become irritated, freeze, or shut down completely. It isn’t because I don’t care. It feels like my mind has reached its limit. Stepping away and focusing on one thing at a time usually helps. I remind myself that something can feel urgent without actually being an emergency. I’m getting better at noticing it earlier, but some days are still difficult. Does this happen to anyone else?