Restless Sleep

My daughter usually sleeps through the night, but just can’t fall asleep. She is babbling through the night and can’t seem to sit still in her crib as if something is waking her up. She does a high pitch scream intermittently, but lays back down. About 2 weeks ago, she went to the doctor for a standard virus and they said Tylenol would help it go away. We also found out she had a yeast diaper rash. Would any of these things be impacting her or could this just be sleep regression??