Conscious incompetence

Feeling  very much 'conscious incompetent' about writing this abstract. Why - it's only a hundred or so words! Reasonably happy with what I've written so far and have been honing it to really reflect what I want to say. However, what will my supervisor say? Will I have done it all wrong or will it be OK? The only measure that I've got currently is what I might be saying to any dissertation student, I guess, but it's very difficult to judge your own work!