This is exactly what the attackers want you to be. Don't let them win.
My stay in Asia was extended 'till the end of this month. One of the things that bounce in my head now is - what Europe will I come back to?
It goes away and you realize that the equilibrium in a civil society is normalcy, and to give in to fear is to lose. Recency bias, forgetting your math/probability/statistics--you're smarter than that. Lead the way for others to keep calm and carry on.