What is this 😩

Hi ladies, My little girl is making this noise during the night.. she's not doing it when I put her down for the first few hours but then around 11pm she starts and it's non-stop. I pick her up and give her a cuddle or BF and she stops, I put her down and not even 5mins and she starts again. I don't have a clue if she's uncomfortable or something.. I've kept the room colder and warmer to see if it was the temp, tried white noise, tried changing daytime naps, tried putting her to sleep earlier or later and it's just always like this. She also wakes up around 3 and doesn't want to go back to sleep so we've dealt with a few split nights.. I'm just feeling a bit lost but mostly worried that she might be in pain or uncomfortable with these sounds she's making 😟