You might be 'projecting' these 'unworthiness' ideas. There are folks on this board who are at all different stages of relationships.
You and your wife may just be going through a different 'stage' in your relationship and it's easy to over think, over analyze and edit your past feelings.
Give it every chance. But that doesn't mean work 'harder'. Or even show your hand...(don't let her know you are working at it, in a sense).
It's easy to get scared....kind of 'what have I gotten myself into' when you've been married before and now are navigating through less rosy parts of your relationship. But just because this piece of the path has more roots and rocks along the way, doesn't mean it's the wrong path.
Give it time. Learn and use your DB skills. CREATE a beautiful relationship. It's sooooooooo worth it.
The truth is, if you end it, you'll most likely start from scratch with someone else, and then get to this point with them (whether or not you're married to them). To be successful, you eventually have to learn how to navigate these changes in the relationship.
sg Love is PATIENT, love is KIND, LOVE never fails / DB since 2001