Snakes aren't deaf. Also, BP can smell that you're not food. Unless she's latching on, she doesn't think your food. You're scaring her.
Moving on... She might be associating your picking her up with a stressful situation, i.e. going to the vet and all that entails. Let her settle a few days, and try again. Also, don't wave your hand around their face. When picking them up, its best to go at it from behind and scoop it up. Most snakes are fine once they're out and know you are not a threat.