I have been getting horrible headaches too... I'm drinking lots of water, so I don't think its that (for me at least)... they started last week with the dizziness and fainting (and low BP) and midwives told me to keep blood sugar up, though I'm eating regularly and I still get them so I dunno... panadol does nothing, and laying down makes them worse so I definately know how you feel. Hope they ease up for us all!