I banged my right knee accidentally in the sink while trying to wash my feet. Help?

I am probably the luckiest person in the world. I banged my right knee hard into the sink accidentally. It was painful. Then I had little pain and walking difficulty. I am trying the price therapy. The only thing I haven't tried is to ice my knee. I haven't got ice in my house.

I can't make it to doctors. This morning when i woke up it was painful. I need help. Its not very painful as I can walk. but I don't know what to do. There is no swelling or anything. Just a little pain it goes from knee to up and down the leg to the feet sometimes. Anyone please advice me. As I said I can't make it to doctors. This happened yesterday and since I am doing the therapy except the ice thing.

I am also using cane. I sleep in the floor. So things are circumstances are difficult for me. I am taking calcium and b12 tablets. Can it heal by itself or do I need to make it to the doctors?