I tend to take my son to the doctor for a cold if the symptoms aren't helped by Panadol or he doesn't seem to be getting better after a few days. The reason being the doctor I go to doesn't like giving out prescriptions/medications if they can avoided and she says the best thing you can do is keep Cooper warm and well hydrated when it is a simple cold. It will run its course over a period of about a week (or that is usually how long it takes my son).

However if you are worried in any way, then take Isabelle to the doctor for a check-up. Better safe than sorry!