Me too on the headaches Bustherb - nothing seems to help (well paracetamol!). In the past I've used origins peace of mind which is really good (lotiony stuff kind of like 4head, you rub it into temples) but I've run out at the moment - might have to send DH out for more!
I've got over bump jeans this time, had the side panel ones from topshop before but they're so worn out they had to go. I'm quite short so with maternity jeans it's a case of what fits (apparently you cant be short AND pregnant!) and I found some over bump petite jeans in the sale so I just got them. The band is so warm - I love it! I did like the under bump style in the early stages last time but by the end it was annoying, the waistband dug into the bump and they were constantly falling down.
I've also ordered a maternity skirt, jacket, casual dress and swimming costume - I've got a wardrobe full of other mat stuff so I'm hoping that will do!