My 11 month old has never slept through the night

My 11 month old has never slept through the night and we’re really struggling.

She’s still waking up at least 3 times at night. She doesn’t take a paci. She doesn’t have a blanket or animal she’s attached to. She doesn’t want to eat or anything just wants to snuggle.

My relationship with my husband is struggling. My oldest is having a hard time sleeping.

We’ve tried to just let her cry it out but she gets so worked up she throws up! I don’t know what else to do. We put a radio in her room thinking it’s the quiet. It didn’t help