What Causes My Daughter S Cold Sweats And Sleep Pattern Disruption?

My daughters sleep pattern has changed drastically over the past two days. All day today she was very fussy compared to normal. I ve checked her temperature periodically today and it s been normal. She also feels like she s having cold sweats. It s been hot so I ve dressed her lightly and when I swaddle her it s because I have the fan on. What could be the problem? Also she has a rash on her genital area that doesn t seem to clear up could that be what s bothering her? I m not sure if these symptoms are related or not but I figured I d include all that s going on with her to try and find a probable cause