Welcome fluffy, and have another hug from me. Really sorry you're going through this at the moment, it sounds like the last few weeks have been really hard for you. You've had some really good, very eloquent advice from the others.
Just to add, this pregnancy has come as a huge shock to me and my DH too- after many discussions, we decided to start being less careful, and I fell pregnant immediately, much to our surprise. Both of us still feel very much in denial about it- both of us agreed we couldn't quite see our future without children at some point, but at the same time we couldn't quite see children in our immediate future, and we'd've been happy leaving it for several more years. But I'm 33, so we thought we should think about it sooner rather than later, and I fully expected it to take a few months at the very least. Since we had the positive test, I've been feeling extremely stressed.
Strangely, although I was very much in two minds about having children before, now I'm pregnant I desperately want it to stick. Yet at the same time I know I haven't quite processed the fact that if it does work out, then we'll end up with an actual baby at the end of it (I realise this is quite a key point!). And when I think about it too much, I realise that actually I'm not looking forward to any of the lifestyle changes it will bring, and we're wondering whether we've done the right thing. So right now I'd say I'm feeling worried and stressed that things will go wrong, tired and a bit sick, a bit disoriented with all the changes that are out of my control, and decidedly neutral about the actual baby part. But excited isn't really part of it for me for now. I'm sure that once I've processed the situation more, and as we get further into pregnancy, it will start to become more real, and we will manage whatever comes, and I'm sure I'll start looking forward to it more.
Excuse my rambling... I think what I'm trying to say is that it's such a big thing, I don't think you can ever be fully ready, and only you can know how you feel, and what is the best for you. You sound like you have a great support network around you, whatever you decide. And I'm sure people on here won't mind you coming on here for advice/a good vent.