What sci-fi genre is my book? [on hold]

I've written a science fiction book that has a strong feel of "fantasy". Three quarters of the story is in a medieval/primitive kingdom type settings (think Game of Thrones or Wheel of Time), there are gods, and supernatural gifts that some characters have been given. There are no aliens. All the worlds are are peopled by humans, though the animal life varies. Some worlds are advanced in this universe and these worlds do intersect in my story. All the worlds are connected by portals that are used to travel between worlds. The gods created the portals and created the universe, and there are lots of spiritual/metaphysical questions raised in the book like, such as, why is there suffering in the world and does it have a purpose.

I don't want to set readers up for a certain type of read by mis-identifying the genre. Is this a space opera? Or should I label it a "portal fantasy?" My gut wants my to label it "sci-fantasy" but that isn't a sub-genre is it? ... I need your help! -Brandon www.brandonbarr.com