Any older mothers shocked that they're having another baby?

My midlife crisis: When this year came around, I had no idea that I was going to be growing a huge baby belly....again! I have older children that have started families of their own, so this is definitely going to be a huge adjustment that their old momma is expecting. This is my second husband and he is shocked as well! Even though there is only one baby, I already look like I'm having two! This was definitely not planned, and I had no idea I was still able to conceive. But on 04-26-11, I found out I was 10 weeks.I thought I was REALLY going through menopause. I am now 21 weeks, and due in nov. This is so different for me. Can anyone else relate?