The Unquiet Past — Kelley Armstrong

Tess has always been tormented by waking visions that make her question her sanity. When the orphanage she lives in burns down, she decides to face her fears and find out once and for all what is wrong with her. She believes the truth must lie with her parents, and so, armed with only an address and phone number, Tess travels to a crumbling mansion in rural Quebec, where she discovers evidence of mistreatment of mental patients. She also makes an unlikely ally and gradually unearths her family's sad history--and finally accepts the truth about her paranormal powers.

Part of the SECRETS--a series of seven linked novels that can be read in any order.