The Restoration Program by Mary Dublin

Nicole’s tragic death was only the beginning. Against all odds, Nicole Zhou wakes up from a fatal car accident to find that she is a beneficiary of a cutting-edge procedure: the Restoration Program. By transferring her consciousness into a new body, her life has been saved. The only problem? Her new body is merely ten inches tall.
As she tries to continue building a life with her boyfriend, Ryan Northe, she struggles to grapple with the strange world developing around her. With each passing day, she questions whether the procedure really saved her life or plunged her into a fate worse than death. Regardless of her fears, both the Restoration Program and Ryan agree: what was lost has been restored.