What does your Objective say? Except for the beginning, there are more or less 5 big dungeons in the game. First is the Twiighlight Cathedral to fight Tiamat. Second is The Hollows to fight Griever. Third is the desert Ashlands to kill the Stygian. Afterwards you take on Silitha at the Iron Canopy. Lastly you go to the Black Throne and beyond.
Hopefully some of those enemy/place names will match up to your objectives. It would help if you could say what equipment you have etc. there are events between those dungeons like getting the gun from Ulthane etc.