I thought she was getting a cold but it's just ended up being a cough. For one day she was coughing all day and it sounded quite chesty. Then today and yesterday she wasn't coughing at all through the day but as soon as she lay down on her bed she was coughing until she was almost sick. She would get up for half an hour or so and then go to bed again no problem. Is this normal? She doesn't cough anymore through the night. Just a little virus? I can't think of anything in her room that could set her off.