Like kelticpete said, slow down a little.
I had the same problem of been sent into areas far higher than my current level by the main quest. So instead of following it blindly I hung back a little, poke around the towns and villages in your current area for side quests you can complete in your level zone, drop down a few dungeons and clear them out. There's a lot of dungeons in Nehrim you wouldn't find just following the main quest chains, they take some wandering through the wilderness and exploring. Cleaning them out not only earns some good experiance points, but almost all of them have a named monster in them, kind of like an end level boss mob who usually drops a nice amount of shiny loot or set items.