My 9 month old dd has been having persistent chesty cough and cold for 4 weeks. She's been projectile vomiting at least twice a day due to the congestion. She doesn't have fever and she's fine otherwise. Playing, drinking and eating quite normally but her night sleep has been horrible. She wakes up a few times at night coughing really badly and sometimes vomits. I've been to the GP three times now and been told that it's viral and it will go away eventually. I'm getting worried as she doesn't seem to be getting better and I don't know what to do.. the last GP gave antibiotics but told to only use it as necessary if her condition deteriorates. Is it normal to have chesty cough for so long? By the way, I was told her lungs are clear.