We don`t think this is Chamomile, but worry it might be a member of the Ragwort family. Just in case it is, it would be wise to wear good gloves if you`re pulling it up as Ragwort is poisonous and can get into your bloodstream. It`s also death to horses etc if they eat it as it dies off.
Cannot be at all sure about this as the daisy family is huge. It may be a very innocent daisy. It`s pretty.