Dear, welcome to HCM.
you clearly seem to have a bad (notborderline )UTI, urinary infection.
You need to do a good urine routine and culture, start appropriate antibiotics, ultrasound
exam of KUB, blood labs etc.
see your doc . and keep me informed. do not neglect. you may be required to be admitted.
in the mean time can contue paracetamol
for fever pain and chewable ondansetron
wish you get well soon.