Hi DeadMinInc
I can almost hear the panic in your voice!

Just so you know where I'm coming from; I'm 40 with two grown up children and two young grandchildren. I became a parent at a young age. I always thought I'd end up having children at some point so I've never had to made a decision about it either way - it just happened.
Ok - I have conflicting voices in my head about your situation.
Voice 1 says that having a child is a big responsibility - certainly not something that you should be pressured into. A child should be wanted by
both parents. You don't want to end up in a situation where you feel resentment towards your partner, or regret making the decision to have a child.
Voice 2 says that once you've had a child it's not the kind of thing you regret doing. Your own children are VERY different from other people's children. It's impossible to put into words what it feels like - it changes your view of the world forever, giving your life a richness and a sense of purpose that's hard to describe. You don't want to end up in a situation where your partner resents you because she feels that she's missed out on this.
I think the most important thing to base your decision on is
not how you will be around the children - you
will be fine around your own children - you will be absolutely besotted by them; think instead about the way your lives will change - I don't just mean by having a baby, I mean all the different phases you go through while bringing up children - watching them develop from babies, to toddlers, to children, to teenagers, to young adults and onwards.
Imagine yourself 30 years from now - do you want to have grown up children and grandchildren? How does it make you feel when you think about
not having grown up children and grandchildren? Think about the big picture - they're not children for very long and it goes very fast.
It would be really useful to hear from people who ended up having children when they started out not wanting children.