This is only good advice to a point. I'm all about seeking counsel from others and analyzing those nagging nervous feelings to root out what the source of them is. But sometimes it's just realizing the gravity of committing to a major decision and knowing there's no turning back once you do that creates that nagging feeling. And it's perfectly normal to be a bit nervous or uneasy on the verge of something big, to me that's not an automatic disqualifier.