The trend of the week definitely seems to be getting headaches in the afternoon. *exhales*
I think this one is caused from working my muscles a bit too much yesterday so I was sorer today than normal.
-As bending and stretching and reaching to get decorations in your tank is rather....well my arm was sore today lol.

And it was the right side that ended up with the headache and the right side that did all the work.
So the headache is probably caused by those aching muscles. *exhales* 

At least taking out my contacts seems to have helped to release the strain. So I may have been too focused today as well...who knows.