Carb limit connected to weight

I'm trying very hard to control my blood sugar levels without medication and I'm doing alright. Not outstanding but pretty well. I have found that to keep my numbers around 120, I have to eat a super low carb diet which I can do. I do have two questions about how my weight relates to this.

1. Will losing weight help me lower those numbers below 120 or is that potentially as low as I can get while not fasting?
2. Could losing weight allow me to add in some occasional healthy carbs like lentils or black beans or is weight not a factor in that way?

Thanks for any thoughts!