Do you have the challenge log unlocked?
Are you doing your daily low level dungeon roulette? The exp bonus you get + the exp from killing dungeon mobs is enough for more than half a level, maybe even one full level up.
At level 41 you can start taking beast tribe quests which give some extra daily experience.

All these things didnt exist in 2.0, so the exp grind was even worse.
It's much easier now.