Diabetis insi... is unlikely in your case urine output should be more than 3 l sodium should gradually rise your is consistently in the range of 140 to 145 you can try water deprivation taste where despite drinking Les amount of water urin will not be concentrated then
diabetes should be suspected all your symptoms are not fitting in diabetic ins... It could be habitual or due to hi sodium osmolority you have poly urea one good general consultation will be useful for you
Next Steps
DI is not likely
Health Tips
One good consultation will help you. visit good knowledge doctor