Blood, Blood, Glorious Blood

I gave blood last night for the second time in my life.  It all went well, the test droplet sank like a stone (meaning I've got plenty of iron in my blood), so there's now another bag of B negative available to the NHS. My left arm was hurting like hell last night which wasn't good.  Also, I felt really rubbish this morning.  I just could not get out of bed and ended up oversleeping by three hours.  I ended up taking the morning off work because I didn't feel like I was safe to drive. Feeling a lot better now though, and I hope it benefits someone.