holding my breath

Question

I am wondering how I should say this.
I am going to end a letter, but instead of saying, "Yours truly,"
I would like to say "Holding my breath,"

any ideas'

Answer 1

You could convey something along the lines of "crossing your fingers" as "de dedos cruzados."

Answer 2

You could say "Esperando (tu respuesta) con mucha anticipación."