Hi Jan and welcome from me too.
If you are using a blood glucose meter, which is what has been assumed, it is actually a very useful bit of kit to help you control diabetes through diet and it can indicate that you might have diabetes, but it is not designed to be used as a diagnostic tool.
If you are getting regular readings of 10 or just below then I think you probably should bother your GP and ask for an HbA1c diagnostic test. I am not saying that you are diabetic, but that you should get checked out.
Alternatively, you could use the meter to help you make dietary changes and bring your levels down without bothering the doctor. Particularly in the current situation and if you are not experiencing symptoms then the GP may be reluctant to do a blood test based solely on your own BG readings. Medical professionals really dislike us trying to self diagnose.
You might be better, proactively reducing your carbohydrate intake and using your BG meter as
@ianf0ster has suggested, before each meal and 2 hours after to adjust your diet so that the food you eat does not raise your BG more than 2-3 mmols in that 2 hour period. Over time I would expect your readings to start coming down nearer to 5 and 6
before eating and 7 or 8 2 hours after food, but as others have said, we cannot definitively say that your readings of 10 mean you are diabetic.....
Stress, anaemia, steroids etc can all raise your BG, so perhaps something like that could be causing you elevated BG levels at the moment.
If you are overweight or have a poor diet or have family who are diabetic then these all increase the chances of you having or getting diabetes but lowering your carbohydrate intake (that is not just sugar but otherwise healthy foods containing natural sugars like fruit in all it's forms (fresh, dried or juiced) and starchy foods like bread, pasta, rice, potatoes, breakfast cereals etc can help to push it into remission without ever having to get a diagnosis. Diet can be a more effective tool than most medication with Type 2 and taking action early is more likely to make it successful.
We can give you lots of tips and tricks to make your diet interesting and enjoyable if you are interested in doing this and weight loss can be a side benefit of a low carb way of eating, if that is something you need to consider.
I hope this post clarifies things a little for you.