>> My main sources of carbs have been vegetables (mostly low-carb types, but an
>> occasional small serving of sweet potato or winter squash) and fruits
Well, you can replace the sweet potato with carrots and pumpkin (not sure if you mean "pumpkin" when you say winter squash.. we use some different terms in Australia). That would hopefully bring you in to the NSD, and should reduce some pain.
You can mash over cooked carrots with a potato masher and add butter and salt. Pretty yummy potato replacement
