Let me give you an example. Last night I received a phone call about 10 pm concerning a dog who had a wound of unknown origin on it's left front leg that would not quit bleeding. The owner described to me what she was seeing and by her description it sounded like this was not an emergency. I told her how to apply some pressure and how to make a bandage out of materials she might have at home. After further inspecting the dog, she found more wounds on another foot and decided she would just feel better if she brought her in for me to take a look. It was good thing she decided on that because we took radiographs of this dog and it was found she actually had a broken leg. It was fractured in such a manner that there was no way the owner would have been able to tell from the outside. If the owner had chosen not to trust her gut and had waited to bring her dog in, the dog would have suffered through the weekend with no pain medicine and no mechanical support of the leg, which could have made an unfortunate situation much worse.
I guess the point I am trying to drive home here is we don't have mental telepathy. Nor do we have a crystal ball to tell us what the problem is. We have eyes and our eyes do not see through the telephone line. So if you think it is an emergency, it probably is and if it turns out that it really wasn't an emergency after all, at least you will sleep better!