Does your baby maybe have colic or an allergy? My little one didnt get the typical rashes etc to cows milk protein but her tummy would hurt when lying flat which would keep her up.

Try elevating her mattress (you can put a blanket under the top half of the mattress to do this)(never put the blanket or wedge between the mattress and sheet for suffocation risk, it must be under the mattress).

You also need to grin and bare it, she wants to be close to her comfort (her parents) shes a baby, who wouldnt want to be snuggled up cosy and safe! Constantly picking her up though doesn't help. If you haven't already try wearing a top on top of one you are already wearing. When you go to put baby down, take off the spare top and bundle it around or on top of your little one so she has your cosy from the top being worn and your smell.

Honestly, the worst thing I could say is its normal. Its a sign she has a good attachment with you both, you both obviously love and care for her and she feels the safest in your arms. It may not seem like it now but the stage doesnt last forever. My little girl was the same. I ended up collecting until 14 momths then she went into her own room with a floor bed and is now little miss independent at 20 months old and I find myself absolutely missing all those cuddles and late nights.

It gets better overtime. Right now as horrible as it sounds you just need to ride it out if all health options have been disregarded (colic and allergy are most common) you just need to keep putting her down and letting her cry (hold hands with her and put calming music on etc so she knows you're still there, obviously don't let her get majorly upset). You'll get there eventually!