Your very low carb diet may have you in ketosis. It leaves one with pretty horrid breath. And less all the low carb devotees bite my head off, I’ve been low carb for 8 years. But you can get many benefits from that diet without going into ketosis - and you get normal breath and take some pressure off your kidney function.
I would ask my doctor for a referral to a nutritionist. You need a few carbs from somewhere - even 15 a
day would help balance things.