You shouldn't be lifting a blood by the tail like that. That might be why she was cranky, plus she's new and insecure. In a week she might have an entirely different attitude. On handling, bloods need a lot of support because they are very terrestrial animals, and their bodies are just so heavy. They won't coil around you for support like a ball python would. Also, some bloods get nippy when they get touched anywhere near their tail, so you might have one of those. Don't try "taming her down" until you've had her for at least a week, or that's just going to overstress her.