Worrying symptoms. Symptoms alarming?

My daughter is 6 years 10 months old. Since school began in Apr 22 she had frequent upper respiratory infections. Almost once a month. Complains of constipation with hard stools. In October we did an USG it showed 5 mm gallstone as incidental finding. On Dec13 we noticed a hard lump behind her ear. Doctor said it's a swollen lymph node and it's common among kids. On 23rd Dec she had headache and fever. Headache subsided same day but fever lasted for 4 days along with cough and stuffed noise. By 27th Dec fever was gone and her swollen lymph node also subsided. But after her fever I noticed that she started sleeping more. She usually never sleeps in the noon but started doing that after infection. Her overall sleep is arnd 10-11 hours. She started complaining about mild leg pain in both legs. I've also noticed couple of times that she had sweats while asleep. Her height is 113 cm and weight fluctuates. Between 19 - 20. are these symptoms alarming?