As you probably know you get two quests when finishing Nar Shaddaa, one is to get to Alderaan and one is to Tatooine. I finished up the quests on Tatooine, including my story missions. Then the questing led me to Alderaan where I arrived nice and sound, I was tasked to repair some stuff along the road, then I got to see some big time Alde politian and thats where I was confused right away. I ran around town only to find there was no missions to pick up except from a mission box, which I could not pick up.
I moved on and got to some outpost on my way to stop the bug people, there was 3 missions that I could see, but was not able to pick up. Repeat this similar scenario 2 times and I had finished my story mission on Alderaan and I was off the planet again, by this time I was only level 29. I did some other heroic quests around on other planets and some flashpoints + finished the rest of the chapter on my story mission. I am now 31, got no quest hub to go to (except Alderaan) and is now pretty much stuck unless I want to level up by pvping or other methods, which I have no interest in doing.