My daughter has had a cold for a couple of weeks and the gp gave her antibiotic . Then last week she started to get a cough the last couple of nights have been sleepless and she's been really bad coughing constantly but early hours this morning we attended out of hours and the doctor said she looked OK but sounded like she had fluid in her lungs and an infection in her chest. But I've read that these symptoms can be leukaemia so now im so worried.