Suspect glucose intolerance but dismissed by GP

[scimus]

Hi, I'm a 30 year old skinny women with a height of 160cm and a weight of 47.5kg. I had a fasting blood sugar test a few months ago after glucose was found in my urine in regular check-up - I remember having a porridge before the urine test but nothing for 12 hours before the FBG test. The result was a normal 4.6mmol/l and so my GP immediately dismissed the previous urine test as faulty because as he said "you can't have diabetes at such young age, normal weight and normal fasting BG level. I wasnt convinced since I had some symptoms and decided to get a meter.
This is the reading after I had 100g of steamed rise (I think this contains about 35g of carbs) and half an eggplant.
Before: 5.2
1 hr after: 9.3
2 hr after: 10.1
2.5 hr after: 9
3 hr after 7.8
This looks very strange to be because 1. it's unusually high for a normal person with a normal FBG reading of 4.6; 2.The figures stayed hight after 3 hrs, all for 35g of carbs, suggesting very high insulin resistance and slow digestive system?
Question is, how can I get my GP to diagnose me properly and what should I do to slow the onset of the illness.
I already eat quite healthy, e.g home cooked meals all the time, lots of veg and protein, only 1200 calorie intake every day. I know rice is bad but I'm Asian and it's just culture that we eat rice at every meal. So really confused at what I should do.

 

[scimus]

My symptoms are also a bit...well shall I say hard to define.
I drink and go to the toilet a lot (about every 15 minutes after a cup of tea for 3 times) but I've been like that all my life.
I've got tired eyes but my work requires about 12 hours before computer on a daily basis so it could be that they're just tired.
I have headaches after meal and hard to concentrate.
That's about it.
Does it look like pre diabetic to you guys?

 

[Daibell]

Hi. Those readings do indicate possible diabetes. You can get diabetes and a young age and then it is more likely to be late onset T1 (LADA) not T2. My slim nephew was diagnosed with LADA at age 22 (my GP said 'that's unusual', but if you read this forum you will find it isn't that unusual). I can only suggest you take those readings to the GP and ask for GTT (Glucose Tolerance Test) or an HBa1C test. A fasting test is not very reliable and not a good diagnostic test by itself for diabetes.