If you agree to resist the urge to call her while she is out, maybe she will agree to call you when her plans change.
We have all been out when we get "the call" and if that keeps happening over and over again it get easy to ignore it.
Bugging her is making it harder for her to want to come home.

You might be having the same problem as me. for 20 years it has been alright for me to be boring, and now, my wife sudenly wants more. If I do not change with the times I too will see my wifes nights out with friends get out of control. I am trying to change that slowly.