It would help if you could tell us what your BG, both pinprick and hba1c, also any meds you have been prescribed. Also, your weight, BMI, height and build. In my experience, without knowing whether, in their youth, someone is/was light or heavily built, knowing their BMI is useless. I mean, my BMI I was techicaly in the safe range, but being lighly built, I was seriously overweight. (I am a natural beanpole
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20g of carbs a day seems a bit low to me, but others may disagree. The low carb approach is very popular around here for us type 2s. About a year ago, I went from and hba1c of 135 mmol/mol to around 40 mmol/mol in six months with a low carb diet and prescribed meds. (I need to book a blood test for my four month check-up on Monday, so you can wish me luck if you like
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I agree with your nurse about cutting completely high carb foods like bread, pasta, rice, potatoes, oats, breadfruit, yams...... etc. Despite at one time being my favourite foods, I no longer touch them. Generally, I aim for roughly 150g of carbs per day of carbs, although others aim lower. Others will give you more details, but the most important thing to remmember is that there is no one size fits all daily carb target. It is a case of what works for you!
Anyway, I will leave it to others to get into the gritty details. Welcome to the forum and best of luck
Irvine