back on (one's) feet

1. Literally, standing again after a fall. I had a hard time getting back on my feet after I slipped on the ice.

2. In good health again after a period of injury or illness. Jill is happy to be back on her feet again after her hospital stay.

3. No longer in a precarious financial situation. Now that I've paid off my credit card debt, I'm finally back on my feet.