PostTyphoid. What really happens in her?

Hi, My daughter 3.3yrs got on and off fever and cold from jan 20th,doctors gave antibiotic and paracetamol after a week again cold became worse and we gave blood test which confirmed with typhoid,then they gave vein injection for 5days(twice a day),fever went but cold was still severe,when ever she sneez cold came heavily, but she was active,then after a week all of a sudden early morning she got 101.4 fever ,so doctor gave medicine in anus and glucose 1 bottle,after that she was ok and no fever,again gave medicine for cold, now after a week again 99degree fever yesterday night,i gave paracetamol 250 4ml Now pls let me know why she gets fever often?no proper intake yesterday morning she had some food and from afternoon no lunch and dinner,she drank only water...what really happens in her?cold got reduced but not fully 90% went...sometimes she says leg pain,if we hold her hand tight she get pain,im really worried and cant sleep,so pls helpme,doctors said her chest is normal,rare cough..