I just wanted to say congratulations, and good on you for keeping up with it while pregnant! I have no experience of having been pregnant whatsoever but I find it very admirable.
I recently read a news article (Daily Mail I think?) about a woman's account of running while pregnant, and that she received a lot of very negative criticism about it - Hurled abuse at in the street for "not considering the welfare of her unborn baby" etcetera... which is absolutely appalling. I do think though that this is due to a lot of the abusers being really ill-informed. From what I've read exercise during pregnancy has been proven to increase health of baby and decrease labour pain to name a few advantages, but people assume you're "shaking" them (which really isn't true while it's in the amniotic fluid).
If you've been given the go-ahead by your GP, are not having/have had a difficult pregnancy there's really no reason why it should be bad! There are a lot of women out there who consider themselves "given a pass to be lazy" (with exceptions for some pregnancies) when really they should be keeping as active as ever be it casual walking or running.
My laptop is so unstable, I've added your blog to my phone, but I look forward to seeing how you get on. 
Good luck!
