Hi
@CrankyKat - I seem to recall your injections were in your eyes? It could be worth adding that to your original post. If you want to add it in, and aren't sure how, just give me or any of the Mods a shout, by tagging us.
Otherwise, I can't be much help to you. I don't suppose you were on your feet a bit more or in a warmer room that usual to encourage you feet to swell?