Mine was a surprise as well.
I had spent the previous 7 cycles doing everything I could, teas, tonics, acupuncture, massage and having loads of sex. So in December we went away for Christmas, and I didn't do anything, and we had sex once.
I guess the old clique of quit trying, take a vacation and relax worked for us. Which kind of annoys me. LOL.
I ended up testing on day 9, with the travel, I was off on my dates. When the line came up, I spent 2 days in denial. It took a couple more tests before I believed it.
Congrats to you, and fingers crossed for a healthy nine months for us both!