A very long headache...

I'm starting this diary to try and make sense of this headache I have. As far as I can work out, I started noticing my sense of smell was increased to the point of the smell of water was bothering me & I was mentioning it to other people on the 27th March 2012. I don't know exactly when the headache started, whether it was before or after my heightened sense of smell, but I'd been feeling unwell for a while & made an appointment to see my gp at least a week before the appt. on 5th April. Top of my list of symptoms was the pain behind my left eye, I'd thought it was an eye infection as it felt hot & swollen in the socket. But as it didn't go away with eye drops & I was having other symptoms, I went to see the doc - I was thinking it could be a return to thyroid problems, as I'd had Graves disease related eye problems in the past & it felt like the pressure pain but only in one eye & without the dry, gravelly sensation. Blood tests were arranged to check my thyroid levels.