Hi, my pregnant dog is on day 65 and 28 hours ago her temperature dropped to 97.8. For the first 13 hours she showed little discomfort. Following this she began to pant and had loss of appetite, and also began to dig in her nesting area. In addition there were several breaks in which she would sleep. These are all stage one symtoms. However according to many articles, she should have gone into labour already. Should I be worried?