That's right!
I think it's better though if you group associated negativities and work on them in one bunch. For me it was a year at college, as you can see it is an associated grouping. But I also had specific incidents at college that were severe enough to work on individually, for example, being mocked by the industrial psychologist who came to test for career guidance she claimed I should become an astronomer because in her eyes I had unrealistic goals and was a dreamer. As you can see it belongs to the greater association on the year but is also severe enough to work on individually.
Cluster the sets with logical associations, like the events between two dates or events like the holidays when I was young, or family dinners or talking to girls etc. Can you see there are logical associations in the clusters.