SHE WON'T STOP CRYING...

I'm going crazy. My 3 week old woke up for her feeding, everything was fine but then 0she wouldn't stop crying. An hour passed I thought maybe she's still hungry so she ate again, the crying didn't stop, I changed her diaper, it didn't stop, played lullaby's, it didn't stop, put her in her rocking chair (on speed 4), still crying, skin to skin, still cried. She had her moments of silence where she stared at me but she never slept...4 hours later now she will only sleep cradled to my breasts which are backed up beyond reason (so much pain). My current state, I'm on my bed in the worst boob pain, holding her, listening to an 8 hour lullaby on YouTube holding back my own tears.