Fever since 3 days. Tested for covid?

My daughter (age: 17 months) is having fever since last three days. Initially fever would repeat every 6 hours but now it is repeating every 12 hours since yesterday. We are giving her anti biotics and paracetamol as per doctors prescription but still fever repeats. Earlier she was diagnosed with covid 19 in December 2020 and recovered. Right now I am (father) covid positive with mild symptoms (tested positive on 18) and under home isolation. I am not living with my daughter since 18th and no other member is positive for covid. My daughter is not having any other symptoms of covid other than fever. I would like to ask if typhoid, dengue or malaria test can be done as of now or we should wait and give anti biotics to her for 2 or 3 more days. And is it advisable to get her tested for covid ? We r continuously measuring her spo2 level and it is coming 98 throughout.