My girl suffer from 尿道炎 when she is 4mths, (now is 3 yrs old)
My family dr told me the sign of 尿道炎 are:
1)painful when vv(bb may cry)
2) the urine is not clear
3) The urine may contain little blood.
4) High fever e.g.39.5C /104F
if so, u need to take your girl to see dr and leave the urine for checking.
In your bb case, maybe her body is fighting the flu, that's whey she body is little bit higher. You better give her some more supplements.e.g. vitamin C from Mea johnson, Kiwi fruit..... help her body to flight the flu. Fever is only a sign telling you the body is in flight. Of couse, drink plenty of water.