What's the name of the last quest you completed?
Grid Main scenario Quest Line
LV 15: The Gridanian Envoy
LV 15: Call of the Sea (Gridania)
3 Main Nations get the following after completing Call of the Sea (Grid, LL, Ul'dah)
LV 15: It's Probably Pirates
LV 15: Call of the Forest
LV 16: Fire in the Gloom
Click the links and see if you followed all the steps and if you spoke to the right NPC to start the next chain of quests. Hope this helps.