Earthquake, floods, personal loss, day to day intensity, rallies and marches. All this and more can take a toll. Sometimes even seemingly minor events can later cause nightmares and intrusive thoughts.

Debriefing helps.

1. Drink water, eat food - Remember the basics.
2. Talk & Listen - Talk things through, express yourself. Write, draw, anything that works for you. You might find that you have a lot of talking  and expressing to do and that is fine. All your feelings are okay too. Listen if you can. Remember that telling yourself or others that "it wasn't that big of a deal" or "you shouldn't be so upset" serves no one. This isn't the time for an intellectual critique.
3. Do something else - Take a break. Get some exercise. Watch a movie, read something unrelated to what you experienced. Find something to laugh about.