Or be afraid of SOMETHING at night?

I can't remember the last time my LO slept a stretch longer than two hours. She wakes up hysterical at least eight times a night. She does this in bed with us as well. We have tried letting her cry herself to sleep but she gets so worked up....
We've tried lights on, lights off.
New pajamas.
New routine.
New bedtime.

I'm at a loss. When she wakes up from her naps, she wakes up happy and quiet. At night, she spends at least 50 percent of the night crying hysterically.

What's strange is how badly she fights bedtime. I can get her down for a nap so easily...but bedtime takes hours.

Help!