Follow the Hummingbird. The Dream Tamer Chronicles, #1

Where do you go when you close your eyes at night? Lonely and depressed after her husband dies, Tina gets through her days on autopilot. But her nighttime dreams are anything but regular. Everything changes when she wakes up with proof that her dreams are much more than they seem.  After recovering from the initial shock, Tina sees a life-changing opportunity. Encouraged by her friends and armed with some magical amulets, Tina embarks on the journey into the world of her dreams.
That mysterious world awaits Tina eagerly, ready to open its multiple doors to her. Except some doors are better left closed... While exploring different realms, hoping to reunite with her lost love, Tina faces the danger of losing her soul to a dark ancient force.  On the other hand, she now has a reason to believe that she can find her "happily ever after" in one of those worlds. Will she be able or even willing to return from her journey?