Stuck in the void. what is going on?

So I was flying in creative and then I dug down below bedrock because I wanted to go back to spawn. In the past this kills a player but now you can "walk" on the void. In order to try to make it kill me, I switched to survival. (This is normally a survival map but I was on creative.) When I did that it did kill me but would not let me re-spawn, only go to the main menu. When I logged back in I was frozen with no hearts and did not have the death screen. After going in creative again, I got a black screen where I still am now. I have worked on this world for over a year and would really like to get it back. Is there any solution to this problem?

Just to clear up any confusion, I know this is much better suited as a comment but I do not have enough reputation to comment yet. Sorry!

emansuperguy, just try /tp @p ~ ~100 ~

And as I said, I know this should be a comment but I can't comment yet.