How can i lose weight if i cannot do cardio exercises?

i was on a weight loss regime and was working hard to shed 20 kg before my marriage in nov this year. I successfully lost 10 kg in 3 months and was happy with my progress.but last week i met a road accident and suffered multiple fractures in fibula.i was operated upon and now i m confined to bed for nxt 2 months. i m afraid all my hard work will be ruined, will gain my weight back and later on too it will b impossible to shed weight without cardio..is there any way out?? can anything b done..i desperately need to lose weight.plz help..