You might decide to publish your work as fiction based on fact, rather than memoir. Adair Lara’s article might be helpful: “10 Ways to Tell if Your Story Should be a Memoir or a Novel” in the January 23, 2012 issue of Writer’s Digest magazine.
If you don’t want to write about what happened exactly as it happened, you can use the emotions you felt during the event. Tap into those emotions to write strong scenes.
Sometimes it’s helpful to see examples of ideas you want to pursue. The following novels are based on fact.
Half-Broke Horses, by Jeannette Walls, is considered “A True-Life Novel”
Captive of Silence, by Alla Crone, is a “roman à clef.”
Diary of a Young Girl, Anne Frank
Into the Wild, Jon Krakauer
Memoirs of a Geisha, Arthur Golden
Eat, Pray, Love, Elizabeth Gilbert
I Know Why The Caged Bird Sings, Maya Angelou
Meanwhile, keep writing. Decide later what you want to do with this precious writing.