A DSN could be a diabetes specialist nurse, I was under one for six months other than prescribing different meds and telling me I should be on insulin the message was always eat more carbs, I'm on around 30 carbs or less a day, lowest was a 10 carb day but I make sure I consume plenty of oils, coconut and olive oil and butter too. I often have them raw if I don't fancy cooking a large meal.
I'm one of the lucky ones at the moment, pretty stable BG on the LCHF diet unless I've picked up an infection, but with anything you can't get complacent you never know what might happen in the future.
I wish you well in finding a solution that fits you.