I tried.

I tried to give blood tonight, sadly it was not a success. All the tests were good to go, but then they couldn't find a good vein in my left arm and since I have my crutch on my right arm they didn't want to use that one.
I'm a bit gutted, but can go back as soon as I'm free from the crutch. They decided not to even try the left arm, which means I don't need to wait three months.
On the plus side, I went and I tried, better than many others do.