What problem does Tom have?

W: Hi, Tom. How are you?
M: Hi, Jane. I’ m fine. Listen, I plan to go swimming in the sports center this weekend. But it’s a long way, and I haven’t got my driver’ s license yet. How about us going together in your car? I’ll buy the tickets.
W: Well, it’s great, but I’ ve got homework to do.
M: Come on ! It doesn’ t matter that you go out for one afternoon.
W: Oh, I really can’t. Although I finished my book report, the upcoming mid-term exam really makes me nervous. I don’t think I’d enjoy an outing now. Sorry, I can’t drive you.
M: Oh, don’t worry. I can find someone else. Good luck with your exam!
W: Thanks. See you!
M: Bye!