When I was pregnant with my DD, I could have written your post. Married 7 years, financially sound, both in good jobs.
I was terribly ill with severe hyperemesis through my pregnancy, but what made it worse was that I bled from 6 weeks to 17 weeks......had to be scanned every week and couldn't bond with the pregnancy at all because I was convinced I was going to miscarry. This got to the point that I didn't want to continue with the pregnancy. I was terrified that I had made the biggest mistake in my life, that we were fine as we were and didn't need this worry or change to our lifestyle. (Looking bad, I feel so selfish saying that)
What made me carry on was the look on my DHs face after I had a massive bleed, was scanned and told the baby was ok but he was utterly terrified I was going to terminate and said that he didn't know whether to be relieved that the baby was ok or not. I just felt that I had made a terrible mistake, was going to ruin our lives and/or put us through hell by miscarrying.
I just didn't feel like I could carry on.........but I did, despite my pregnancy turning very high risk and almost losing DD at birth, twice, and her subsequent serious illness.
Now? She's the reason I get out of bed in the morning. She's the light of my life, and worth every minute of pain, worry, heartache. I would do it all again....FOR HER. We decided to stop at one child as the risks to me, for both my mental and physical health would be too great to go through another pregnancy.
In hindsight, I was suffering badly with pregnancy symptoms and hormones, and a terrible case of cold feet; the fear of the unknown. Yes, our lives are very different as I gave up work to be a SAHM, but you know? Its great. I don't miss work, I spend all my time with my lovely 3yr old DD and I wouldn't change it.
Yes, its been challenging, soul destroying and bloody hard work, but its also been the most amazing 3 years of my life.
Good luck.