Also Andrew, you will get quite intense shoulder pain so when they offer the paracetemol, take it even if the pain hasn't started and keep it up at the recommended intervals. It's entirely normal but no-one really tells you to expect it. Takes about 3 days to stop.
You will be expecting the worst of everything - it won't happen and is actually a lot easier than you are expecting.
If I had to do it all over again I would without a doubt.
Good luck!