After you do it for a long time, it just becomes another day along the way. Yes, the more significant emergencies stay with you, they just fade to the back of your mind with time.
24 years ago when I started, wasn’t like it is today. We didn’t have peer support teams and people you could talk to if you were having issues after an incident. With the emergence of PTSD & “burn out” as real things along the way, all of that has changed drastically in about the last 5 years.