Not sleeping well

I'm not exactly sure whats causing it, but almost 2 weeks now Leiland has slept like crap. While in Hawaii I attributed it to that first tooth coming in but once it cane through he got drastically worse. Now that were home every night for the past week has been a struggle. One night he just screamed. Nothing I did made a difference either. He also ends up in my bed eventually every night as well because he won't let me out him down. He is so clingy and inconsolable. I hope it passes soon because he is so tired.