At my wits end....

My daughter has suddenly (within the last two days) started screaming bloody murder almost as soon as we lay her down at night. It goes on for hours, nothing soothes her. I can't deal. No sign of teeth. No fever. Her ears are clear. I don't get it. I'm going crazy. My husband either works until late at night or goes in before 4 am... He's no help. Anyone else dealing with anything like this? Cry it out doesn't work either, she just goes on and on.