It's a huge step and it's bound to make you think long and hard about everything - it's only natural as you set off into the unknown! What you have to keep in mind is that changing everything as you know it will ENHANCE your relationship, as you've created a tiny replica of both of you. The second that little mite enters the world, you will never be the same again - you will be a mother, and I promise you, you'll be over the moon and will never look back! Dad too.
You've done yourself proud by not rushing this, and by making a good foundation for your future as a family before falling pregnant. You've obviously got your head screwed on tight, and I think that that is what'll be making you worry. You're sensible, and suddenly your body has taken over, doing things that don't make sense any more, and your hormones will be flying round making things worse. You need to relax and go with the flow a bit more. There's a lot of stranger stuff yet to happen...!
You'll NEVER regret having a baby - you'll be consumed with love the instant you lay eyes on him/her, and all the doubts will melt away. You'll feel complete and will be ready to lay down your life for this tiny part of you to stay safe. It's an extremely powerful thing - the mothering instinct - I'd do it all again in a heartbeat!
ENJOY this time while your body does what it does. You don't have to know how to do it - just relax and watch the amazing process. Please don't worry yourself about anything - you're a sensible, lucky, lucky girl and I'm sure you're going to be a fab mum xxx