Hi, I am 27 weeks, and usually work out at client sites, but am working in the office for next few weeks, chairs are fine but towards afternoon my back really starts to hurt....any idea what sort of back support i can get to help? i was looking at the wedge pillows (i use one to sleep and they are awesome) but wondered if anyone had any recommendations as to what type of pillow and where to get one from, the current 60 mile drive to work and back home again doesnt help....