Welcome never! and congratulations.
ellie my daughter didn't walk until nearly 16 months, so there is every possibility your daughter won't be walking but I second rallytog, it will be a good thing! Once they are running you can't keep up with them and even if she is walking by then it will be a while until she is climbing stairs by herself anyway. I would probably sling the baby and hold her hand up the stairs, my dd was pretty good at walking with a hand held by then 
And you will get to enjoy your pregnancy and veg out on the sofa with your little one without endless games, running around and trips to the park to wear them out. Look on the positive side!!
I woke up feeling sick this morning. It only lasted 5 mins and I just stayed in bed until it passed. Sent dh to buy porridge, polos and peppermint tea yesterday. I'm first tri ready now!