Thanks, angie81, that helps a lot. My supervisor seems fine with what I've got, so hopefully it will all be OK. I'm going into teaching afterwards anyway, so it's not vital that I pass but I would be gutted to fail after all this effort.

This is my first time posting, but at the moment I am so worried I need to ask for some help. Over the past 3 years I have been working on a project that initially appeared very promising, but has given nothing but negative results. I have also become increasingly demotivated and depressed, to the point where I haven't been working as efficiently as I should. Now I will be submitting in September and, although my supervisor has indicated that perseverance and thorough investigation are valid arguments for why I have pursued this project, my co-assessor has commented that "there are a lot of negative results here" and asked "where are the publications". I will hopefully have a publication from an unrelated side project which will slot into my appendix, but it is only second author and I doubt it will be enough. I am basically terrified that I will be exposed at my viva for poor experiment design, bad overall choices, not enough material, and lack of subject knowledge (since I have been depressed I haven't been reading and am now too busy). Please let me know if you have any advice that could help.