Unable to exercise

Any suggestions if someone can't exercise? I am unable to do any amount of walking at the moment. I have an appt. next week to see a specialist to try to sort out my problem with my feet. Until then, every step is painful and it is very disheartening. I know I need to move! This is just sad that I have gone from walking 120 -140 km a week just 4 years ago, participating in marathon/competitive walking, swimming and deep water aquafit down to nothing. We have also moved and I do not have access to a pool any longer otherwise it would be a no brainer! Help!!!!