Oohh catching up yet again after a day or so of being away!
Good luck for tomorrow ever and shell, you'll both be awesome and fine :)
Like Sparkles says, I was also pacing and shaking like a leaf in the scan waiting room. I'm so glad the gel used by the sonographer was warm, I think if it'd been cold I'd have shot off the bed and burst into tears with shock!
And sparkles to answer you, I was off last week with a nasty headache but I think it was more dehydration than anything - I'd been feeling a bit yuk the night before and hadn't even kept up with enough water really. This was nasty in the sense of just a constant throb, not a full-on pounding pain, so I think it's sort of similar to what you're describing.