Your daughter needs urgent medical attention immediately, as a high fever with severe cough, breathing difficulty, vomiting, and extreme drowsiness are serious warning signs. Please take her to the nearest hospital or emergency department without delay, as her symptoms may indicate a severe chest infection or dehydration. Do not give her any further cough syrups at home, as she may need intravenous fluids or oxygen support under medical supervision. Keep her sitting upright if she is having difficulty breathing, and only offer small sips if she is fully awake, but do not delay seeking urgent care.