Is 2-year sleep regression a thing or did we screw up our kid?

About two weeks ago my 23-month old daughter started waking up throughout the night periodically. Since then her behavior has deteriorated drastically and she is nearly impossible to put to sleep. Prior to this change she'd would easily go down with a bedtime story or a song or two and would sleep a full 8PM-7AM cycle. WTF IS HAPPENING?!?!?! (my wife and I are ready to tear our hair out...haven't slept more than a few hours at a time and it's almost like she's a newborn again).I guess we got complacent because she refuses to nurse, won't take her nap at the usual time, won't go down with songs/books/storytime, etc. None of the usual stuff is working. She basically ends up crying for several hours while we try to calm her down. We have tried the cry-it-out method but all she wants to do is jump around and talk and do things. She is clearly exhausted, she is fighting her eyelids to stay open but the rest of her body is in overdrive.Is the 2 year sleep regression a real thing? Any ideas what we can do to get this child to sleep??? I feel like we've tried everything. :/ via /r/Parenting http://ift.tt/2ArjCaF