Suggest Remedy For Difficulty In Sleeping For An 13 Week Old Infant

hello, doctor ! I have a daughter of 13weeks old. Her sleeping quality is not good, difficult to fall asleep and stay asleep. When she is falling asleep, she tends to have a lot of witches,really a lot, as many as 30-50, lasting for maybe 1-2hours. She would wake up after midnight and cry. She falls asleep on her own without any sleep associations, so I don t think she wakes up for asking us to help her to go back to sleep. During daytime naps,she has mini naps and when she wakes up she will try to fall asleep again, but it seems something is hindering her from doing so. So she always turns her head to the left and to the right and repeat,her eyes are closed but couldn t fall asleep again. Due to frustration,she will burst into crying. She is sleep-deprived and overtired. Recently, she is also not feeding well, snack feeding and refuse to feed. She has less wet nappies and her poop is runny. What might be the cause of her sleeping problem ?