When it comes to getting an assessment for any sort of mental health issue the best advice I've heard is to answer all the questions from the perspective of your worst day because that's the situation you're trying to avoid. Coping mechanisms are great but they don't work all the time, and at least in my experience once they fail I end up in a downward spiral that can be really hard to get back out of.

Best of luck to you - I made an appointment to go and actually finish the assessment process off the back of reading this article this morning. I wonder if having started it and got distracted twice previously will count as a point in my favour?