How to make most if dietician appointment?

Have an NHS appointment tomorrow with dietician.

What can I push for to get the most out of it?

Please state clearly exactly what and reason

Due to trauma , I turned to bad food to cope and it's taken its toll on my insides. I have early signs of diverticulitis and bad B.O and mouth odour.

I've recorded food intake and eat smaller portions and better food now.

With the NHS, however, they are likely to see what and think no more we can do. They only do what they could have done ages ago after a crisis/problem has passed and they need to intervene.

I don't want to wait to get what I could have got earlier if I'd only thought of asking of asking for it tomorrow