Hello,
I've been reading your various threads and thought I would just say that if you don't give honest answers and the DVLA contact your GP then its game over. I lied on my form and they contacted my GP so I had to wait 12 months until they issued my licence. They do all this for a reason, to keep the roads safe, and I was a complete idiot.
You have 2 choices; answer no to all the questions, pass the CDT and worry like hell that the DVLA don't contact your GP or just be honest. If you pass the CDT and they contact your GP who justifies your abstinence for 12 months then bingo you get your licence worry free.
Tough call but either way it's stressful. Hindsight is a wonderful thing and I know what I should have done.
Good luck and let us know how you get on.