I have always been my dogs favorite person, he and I are super close and I love him dearly. A couple of hours ago he just started growling and snapping at me. He is not the friendliest dog with strangers and will growl at them but he has NEVER done that to me before. He will let other family members get close and when they pet them and acts fine around them but whenever I get even near him he will do the same thing growl snap and lunge. I have know idea what's wrong he seems healthy nothing looks hurt, I have know idea what to do. Its been going on for hours! Please help!