DD is 23 months, after a cold and sniffles all week she has woken up with a dreadful cough, really nasty sounding chesty cough, occasionally leading to retching noises. She hasn't wanted to eaet this morning, she did has for warm milk, but brought it all back up again during a coughing fit. She's not really had coughs before, what can I do to make her more comfortable, I seem to remember she can't have cough meds at her age