your child seeems to have viral fever
, tiredenss is non association . it will get resolve by it,s own in 5 to 10 days max.
take care about oral intake and hydration , soft diet
, lot of fluid is helpful. paracetamol
along with antihistaminic like chlorphenarmine ican be tried if fever and congestion is disturbing.
if fever is rising along with worsening of condition evaluate for any secondary bacterial infection.
get back to me if i am helpful to you.