I use a new lancet every time I test and a new needle for each injection. My finger ends still look like pepper pots, but they’re rarely sore for more than a few minutes or so, and I only test on two out of eight fingers! Even when I shoot up a double dose of Lantus in the evening, I change needles between doses and in the last six or more years, I’ve never had a problem with any of my injection sites.
So in answer to your question for Charlie above, @mustard, yes, pen needles are available on prescription from the NHS and so are lancets; needle clippers too. There’s absolutely no reason to risk pain and complications by reusing them!
I hope you get a pump and/or CGM soon @Stephen!