Sleep Disaster

It seems like a couple times a year we have a few weeks of horrible bedtimes...this is one of those times! It has been a nightmare at our house lately. Literally. Last week she started not wanting to go to bed at night, but she did. Wednesday night she woke up at 11:30 hysterical and I put her in bed with us. She was OK the next couple nights. But this weekend was the worst. I'm hoping it was kind of the peak and now it'll get easier again! Fingers crossed! Last night was a.w.f.u.l. Finally, at 9:30 (after 1.5 hours of crying, screaming, rocking, singing, etc), I gave in and put her in bed with us. She quit crying, but she was still wound up and didn't want to sleep. Today's naptime was a joke. She fell almost asleep while I was rocking her so I laid her down and she was fine. 20 minutes later she woke up hysterical and never did go back to sleep. Tonight everything was looking good, but when I laid her down she started in again. Finally she just asked me to leave the door open and she's been in there quiet for about 10 minutes...fingers crossed she stays that way. I hate the way she's crying. It's a snot bubble, drooling, heaving, gasping for breath, eyes wide and terrifed kind of cry. It breaks my heart and I don't know why it started. I don't know how to fix it and that kills me! She has to sleep, I can't give in completely! I'm praying this is a (SHORT) phase!