Where did I go wrong???

I'm devastated. When I was diagnosed early February my HBA1c was 5.2. I've just had it done again and the receptionist at GPs has told me it's come back at 5.8. I have followed all the low carb advice here and have stuck at around 50g per day and tested and tested. There have only been 2 occassions in the last 3 months where I went above 8 and these were from meals out (to restaurants that I will not frequent again). I have maintained a great exercise regime and I'm not overweight.

I do appreciate that for some people 5.8 would be a great result but I'd rather have my 5.2 back. There's no point in me seeing GP as he maintains that below 7 is an achievement and DN whilst lovely thinks that I've cut the carbs too low (obviously not!).

So as a relative newcomer to all of this I'm not sure what to do now. Advice from the more experienced would be gratefully received. Please. M

Late last year I went to GP with host of symptoms. He ran a load of tests including fasting BS. This was 6.3. So he sent me for a follow up gtt which was 12.2 at 2 hours. Hence the diagnosis.
Maybe I should add that the diet has rid me of the symptoms I presented with at gp's originally. These included chronic fatigue, what I now know to have been neuropathy, depression, mood swings etc. So I'm not planning on going back to old diet just don't get what is going on. M

Thanks for the support but I'm still sulking and throwing my toys about. M