help with screeching?

Amy

My baby screeches. All the time. It's sometimes because she's mad, sometimes happy, sometimes just bored. It's driving me f-ing insane. My ears hurt. I've tried to ignore it, I've tried to tell her to stop, I've tried putting her down and walking away. She won't stop. I'm losing my mind. She's done this in phases since she was like 2 months old but we are on a particularly bad streak right now. Any suggestions?