The End of Creation Enforcement - Valoryn Universe, #1

Emily was a Creation Enforcement agent. That is until cancer got her dismissed from duty. After a year in remission, her old colonel enlists her help in finding her missing team. A sense of obligation makes her agree, but one disaster after anotherhas reinstatement moving further out of her reach. Past mistakes will haunt her as she traverses portals, the known univers, and the future to prove cancer didn't ruin her.
But maybe her own bitter nature did.