O_O? I didnt get to the crucible like level 45-46. When i was level 42 i was in the Tower Archives. Do some side quests in previous worlds rather then Dragonspyre cause you may not be ready for them yet.
Soon before you know it you will be....:
A level 44 in the Crystal Grove A level 45 Hatching a Drake in the Drake Hatchery A level 46 Going to Malistares Lair. A level 48 Ending Survey Camp in Celestia ._. ( Yep.... I was that level when i ended it xD)