Does anyone have a child that just cries for no reason?

I have a dck who will just randomly start wailing this screechy, loud wail for no reason at all. Nothing will have happened, no one will be near her, she'll just start wailing for no reason. She doesn't stop if I pick her up/cuddle her and she doesn't stop if I just leave her be. Even if I give her her soother, she'll just scream around it. And then she'll just randomly stop. She's been coming awhile, so it's not that. She's just under one and a half.

My poor ears are just ringing and I feel like my nerves are shot.