[You can just say "I'm in trouble and need some help." That's not rude, kiddo.]
[And with that warning about the vampires, she thinks she has an idea of what might have gotten to you.] I shall be there momentarily, and I assure you I will take care on my way.
[Call]
[And with that warning about the vampires, she thinks she has an idea of what might have gotten to you.] I shall be there momentarily, and I assure you I will take care on my way.