Is the Rabbi coming?

I'm having an interfaith wedding (I'm Jewish, he's not)... It's ultra reformed, it's even on a Friday night. However, I did find a Rabbi who will marry us on that night, and there will also be a Reverend. Recently, the Reverend called me to confirm the date, and then he sent me a script of how he does his ceremonies, just so I can get an idea. The Rabbi is M.I.A. I haven't heard from him, so I'm convinced he's not coming to the wedding. I know what you will also say: 'Why don't you just call him?' I feel stupid. I don't know why. Why am I such an idiot!?