In that scenario you probably should have backed out until daylight and shouldn't have gone any further when you jumped it the first time and it kept going like it did. Do what Flags said and get permission to go back ASAP and see if you can find it, but I'm guessing he's correct and it was a muscle wound that will heal if it went that far. Blood trails can look like a deer is spilling gallons when in actuality it's not that much when compared to how much they have in them.