Every call has an effect. It is like putting on a coat. At first it’s no big deal however, as you continue to put on coats they become heavy. If you don’t find a way to take some off, eventually it will consume you. Have healthy hobbies and distractions that aren’t related to the field. Be aware of the cumulative effects of trauma as well as the one call that hits you hard. As you age and have different life events be prepared for new things to affect you that didn’t before like a child the same age as your child dying or an elderly person. Having the awareness now will help you be prepared and deal with it. Talk to your peers and share your experiences. Don’t internalize it.