I gave blood for the first time about two years ago and haven't since (I am ashamed to admit). The actual donation was fine, even for someone not best fond of needles and I felt ok on the evening afterwards. The next day I spent the afternoon lying on my bed feeling like death warmed up and it has put me off. I also felt like I was missing a lung for about two weeks afterwards which had a bit of an impact on cycling etc.
I did have a very little to eat or drink the next morning and spent the best part of three hours stood still (chopping loads of green tomatoes for chutney of all things) so I know I didn't help myself! Once the Rivi trail half is out of the way I should really go donate again but I'm a bit worried the same will happen but on the other hand what is a bit of discomfort if it saves someones life.
Someone tell me to HTFU and use it as an excuse to rest up and pig out on dark chocolate for a weekend!