I really feel for you and just wish i could give you some good, solid advice. I do understand how you feel. I spent many years bulimic, which eventually BADLY affected my teeth and my confidence. (i had no idea that flouride attacked the acids on tooth enamel after being sick). I could not get an NHS dentist either, as they said it was cosmetic. Suppose it was in a way, but i was in awful pain and my teeth were crumbling and bits falling out all the time! I had to take a live-in job and do it constantly until i had enough dosh to go private, but at the time , my circumstances allowed for that.
Do dental universities do so-called 'cosmetic' treatment? I know they can do extractions etc, but surely they need to practice tratment for more complicated work? Its awful not having the huge whack of dispensible income to pay for dental treatment. I currently need some work done, but have no chance whatsoever. Maybe if you make a point of telling the counsellor how badly you are being affected, they can work something out for you? I have read articles on how women have had nhs boob jobs, after explaining to their counsellor how badly their confidence was affected by having little boobs. In my opinion, teeth which don't hurt are alot more important - and that's coming from someone with small boobs!