I went through something similar when I finally went hard-core on the gluten-free diet. I was tired and needed to sleep, and slept nearly 12 hrs a night for a few weeks. I'd like to think my body was finally healing itself. (I also lost a ton of weight and felt much better.)
I don't recall feeling teary, more slow and almost meditative and SLEEPY. I slept really well, and woke up feeling marvellous every morning.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson