I believe it was the guy from Star San that I heard commenting on how even though C brite claims dual purpose, it's allowed to technically claim "sanitizing PROPERTIES" merely because it is a cleaner of unsanitary things. However, it has ZERO sanitizing ability and contains no ingredients that act as sanitizer. However, not sanitizing doesn't always mean beer will contaminate - it just means you are rolling the dice a little. How good the chances of having a problem are, depend on a lot of things - but usually, you've got pretty good odds of making great beer. One thing I think you've got in your favor here is that this was your first brew - so presumably everything your post-boil wort touched, was brand new. This will definitely swing odds in your favor a bit.