MummyJo,

I went through the exact same thing around the 9 week mark as well!!!

This pregnancy has been all over the place compared to my last one and I don't remember the temperature issue with Patrick. But this time I was definately hot one minute and cold the next.

I thought I might be coming down with something, but nothing happened. You just to ride it out. It's just your body adjusting and your placenta is really starting to grow now and it should be fully functioning in the next couple of weeks.

Maybe it has something to do with that and the change in hormones that this stage causes. Sorry I can't be more help, but if it helps, I haven't had that for a bit now....