Some people may also change expectations for their future as a result of surviving a traumatic incident. Young, for example, told NBC's "Today" that she wasn't sure whether she should remain in Colorado.

It's important to make sure that life changes aren't negative, Brymer said.

"People need to know that this is very common, but there's really nothing that you could have done, and move on with their lives," Jones said.

If you are experiencing suicidal thoughts, call the National Suicide Prevention Lifeline at 1-800-273-8255.