Help with sleep

Every single night she scream bloody murder before going to bed. I can't take it anymore. She screams at the top of her lungs until she can't breathe and she is sweating profusely. How do other people get their baby to sleep. I try and try to put her down while awake and it doesn't work. I nurse her to sleep and it doesn't work. She is sobbing into her bed right now after 45 minutes of crying.