I have most of these symptoms that you have explained, although I don't have the swelling and the discomfort of the kidneys. One thought that comes to mind immediately is that your kidneys, the source of the energy for the body, is working extra when exhausted, perhaps a bit inflamed. I have problems with my kidneys not giving enough energy, therefor my energy collapse when I don't take herbs for strengthening my kidneys. It shows like day and night for me. Without these I crash, really crash. Your kidneys seem to have some defence and strength still, trying to compensate for it.
How are your troubles today?
How you found any help for it?
I'm looking into how I can help my kidneys in a non-medicine-way myself, to get them working on them own.
It would be interesting hearing about your experience of it.
Hope you can get back to me.