CROSS-TRAINING/INJURY ADVICE PLEASE?

Okay so I was just diagnosed with a pelvic stress fracture. I probably won’t be running for at least two months. This is very, very bad because I NEED to stay in shape so that as soon as I return to cross country I won’t be too far behind before our big meets. I really, really need some good cardio workouts that don’t involve running. Swimming is the only thing I can think of, but is that enough? I’m also not supposed to bike. I am on crutches, so walking is also not an option. PLEASE give me some good cross-training advice that will keep me in shape for two months!!!!!!!!!!!