Yep. I'm there right now, in the middle of the reproductive tug-of-war happening both in my marriage and in my own head. Until about 3 months ago, I was pretty much settled that I would never have kids. And now...
"What the crap?!?" is exactly the response I'm having.
My counselor/spiritual advisor's advice was to just indulge the fantasy for a while, and see if it's something you really want, or just a passing biological imperative. It hasn't really provided a lot of clarity
but I've had a lot of insights.