Curses of Lavender by Isabella Stofka:
 
For as long as Thicket can remember, she has been plagued by dreams of a fantastical world where magic lurks in every crevice and flows through every living thing. Dreams that always felt a little too real, a little too much like memories. After one such dream goes haywire and leaves the ties between her and her town in shambles, Thicket desperately tries to prove her sanity and avoid the life of isolation drawing ever closer. As her attempts spiral out of her control, she realizes it doesn’t matter how hard she tries to fit in. It will never be enough—she will never be enough.

With nothing else to turn to, Thicket goes through a door in her dreams, hoping to find answers. Instead, she is transported to the world she has always dreamt of, but it is far from what she imagined. The kingdom is cursed, and according to the strangers in this new world, so was she, and now that she is awake, she is the only one who can save them. But with her memories gone and her past failures a suffocating weight, Thicket doesn’t see herself as the savior everyone believes her to be.

Thicket must make a choice. Give into her fear. Or, conquer her demons, reclaim her memories, and take back her throne.