You have fever  but you are not Covid positive.  There is a theoretical difference between the two situations. I suggest both of  you wear  masks and stay in the same room. I said this because  the positivity rate is fairly high these days and even Government is not very particular about isolation and quarantine. At times it is better to be pragmatic than being scientifically correct

Not necessarily needed if both are covid

Consultation needed. Consult personally on Practo app or 8318469_886

Stay together But mask against your baby

Better different room.. you stay with kid.. but proper mask and hand sanitze each time before touching baby.