Tell him your fine and not to worry... women can do most anything as well as a man (lets not dicuss the open ended part of that statement).
The thing to remember is you can drive that truck probably better. You won't think to yourself. "I think I can beat that train to the tracks in a rental truck" and if you get lost you have no male ego that prevents you from asking for directions.
hang in there Orchid. If he is calling then somewhere he cares. Worrying is caring, it is a small start and that's what the book says recognize. Keep focusing on you and your life, don't let it get you down! I know a lot of people that would never have the courage to do what you have done so far!