Son was off school for 4 days with a nasty cough and tiredness. After a week daughter (3) started coughing, fever, nasty chesty coigh and fully blocked. She had 4-5 days of fever. Recovered from that but now so tired. Anyone elses kids have this? Is this something going around? Cough still lingers at night and she has fits - gets better slowly but still disruptive in her sleep. Thanks so much x