One thing that I've learned from the SI veterans is that the first confession is almost always the tip of the iceberg. That happened to me. Because I believed what he told me at the beginning that I thought that was "it". But the people here in SI, especially those who've BTDT were right in my case. There were more DDays after DDay1. The pain was excruciating after every new discovery. For a BS, it is mind boggling how far they would go to preserve themselves.(see my story in my profile if you want details)
I guess what I am saying is brace yourself for some more "truths" to come out. Heck I was getting some more "truths" as late as Dec 2013 and my Dday was Jan 2013.
Trust your gut -- it is amazing now spot on it is!
Sending strength and love your way.
It does get better. One year on, I still think about my WH's indiscretions, but I don't cry as much anymore.