Good shot and nice doe. As for blood trails they can be a weird thing. I've had similar experiences with deer that should have left more blood but didn't. Three years ago I shot a doe broadside at 18 yards with a 4 blade Muzzy. She ran 70 yards and fell just out of sight. I found her easily because she went down so quickly and close by but there wasn't a single drop of blood on the ground anywhere despite the fact that my arrow entered tight behind the left shoulder and exited lowbehindthe right shoulder. Her chest cavity was full of it however. I guess something just quickly blocked the lower exit hole.