Thank you for the tag
@Nicola M. Hello
@ThornyHedges Nicola is correct - I had a kidney pancreas Transplant literally 8 days before I was due to start dialysis. Kidney function was first noted in my case in 1973 at the age of fifteen. It was monitored fairly primitively until 1978 when I became a patient at King's College Hospital, which was part of my college where I was a student. By 2000 I was referred to Addenbrooke's Hospital where they predicted 5 years before dialysis. Since September 1966 I had been on 245gm of Carbohydrate daily with a bolus/basal mix before breakfast and before supper. In 2000 they restricted proteins, but allowed me to have 220ml of milk daily. The advice then was to avoid all foods which came from seeds, including coffee, strawberries, chocolate, and ice cream. I ate lots of casseroles with minimal amount lean meat and lots of powerful vegetables and was allowed certain fish. It was tough, but when it comes to needles, cannulae and scalpels I am basically a cowardand so conformed. As the CKD worsened I was put on phosphate binders. I actually lasted until August 2013 before they gave me a donor pancreas and kidney. The first non-hospital food I enjoyed was a plain Magnum! Never has food tasted so good...
But Obviously your diet does not match mine during 1966-2013. I would focus on achieving a good HbA1c to help with weight loss. Stage 3b is is not necessarily an imminent problem, but the better you manage your blood sugars the slower CKD is likely to progress if it's only caused by diabetes. I happen to be allergic to Statins (whole body rash) and therefore looked for ways to control it. Since you are fine with them you might consider oats (obviously carbohydrates) as part of your diet. I have been eating them for over 25 years and have maintained good Cholesterol levels.
At 3b I was not told to reduce proteins, but you could make small adjustments if you wish to. For example the bones and skin on sardines are the high phosphate parts. My wife is on a very low fat diet and as I do the cooking, I use skinless chicken, trim the fat of pork chops and cook them with whatever herbs and spices you like and wrap them in foil. Similarly you can trim bacon and beef or eat turkey steaks. Fish (eg cod, haddock and most others) shouldn't be a problem at the moment.
I must stress that this worked for me and should only be taken as personal experience. I would talk to your doctor (are you seen at a hospital?) and tell them your worries since they tend to tell patients finer details only when asked.
I fully understand your predicament and wish you the very best of luck.