Awww it horrible isnt it. I had to wear thongs from 16 weeks because I literally couldnt wear any other shoes. As yours has come on so fast though, I woulb be inclined to go get a BP check, just in case. Were you sitting with your feet up or down? If you were sitting for a long period of time and they were down it could just be that the fluid pooled in that time. Try to sit with your feet up as much as you can to ease it up hun and let us know how you go.