Fiancee is not a legal relation here. You can't bring your fiancee on visit visa here. But you can do so by acquiring touris visa for her. For tourist visa you will have to contact to some travel agent or hotel directly. You'll have to spend around 1500 to 3000 QR depending which travel agent you go to. tourist visa is valid for 14 days only and it can be extended only once for another 14 days so in total 28 days. hope it helps