At least now I can sleep. The first night was a torture: no matter, how I tried to lay my foot, the ankle ached terribly.
It worked: I spent most of the time, doing exercises on a chair, followed by the same relaxation and euphoria, as the first time.
Today my foot and ankle are complaining. Turmeric helps a little, but I walk with a cane, limping and lurching, like Dr. Frankenstein's assistant, Igor.