Hi
Saw your message. Know it's quite a long time after you posted. But I really identify with what you wrote.
I had my first at 39 & my second at 41. It's a big change, but I think you are better to be nervous now - it gives you more time to plan.
If you're worried about the birth, I would say believe it will be fine whatever happens. Make sure you plan for worst case scenario as well as best. I wanted a waterbirth at home & ended up with an emergency caesarian! So much for all that ante-natal yoga. The thing that helped was I'd planned what I'd do and also I'd taken time to visit the hospital & had talked a lot to my midwife. Giving birth in hospital is made out to be a negative experience quite often. I'm not saying it isn't sometimes the case, but for me, it was, literally, a life saver. Because I'd allowed myself more than 1 birth option I wasn't as shaken when things started to unravel.
If you're worried about life after -
I'd suggest joining NCT ante-natal classes if you can. The friends I met then were near me in age & are still my mates now. They were a great help. It really does help to have friends with babies the same age.
The biggest adjustment is after the birth. If you've been working for 20ish years it can be really hard & quite lonely if you're not careful. The first few weeks are euphoric and then you realise that it's you & the baby at home, all day....think about joining some groups - baby massage, waterbabies etc. They all cost money unfortunately, but there are also some good mother & baby groups out there. We all used to meet up once a week & go to the big scream at the Cameo.
It's a bit like becoming a member of a club that you didn't know was there. You share something with all parents - a love for your child and basically, everyone will tell you - it will see you through anything.
Good luck