From Tiny Acorns...

...I did find a tinier one but it had fallen while it was still green so I wouldn't have had much contrast with the leaf.

It looks like much of my parents' Oak tree has been home to wasp babies as there are several galls too (I had to look this up as I didn't know what what the shell like things were!)

Health-wise a much better day I'm happy to say :) The constant changes from warm to rain and back again haven't done much for my headache but I think I'd feel weird without one now!