Rogpt51 - as Hobs already said you are currently taking half the maximum dose of your prescribed medication and it is early days yet. But know that there are plenty of other treatment options available should you need them.
Remember that worry and stress can make your bg levels rise, so do try to relax a bit more. This diabetes thing is not always easy I know, but the more you learn about it and how your body works the less fear you will have. Do a search on google for - Jenny Ruhl blood sugar 101 - and look through all her pages, it will be an eye opener, it was for me.
I personally am a low carber, I have reduced down to 40g of carbs a day and it suits me. Others dont have to cut down as far as this and some have to go even lower to maintain good bg control, there is no one size fits all.
Have a look at the threads 'why I dont low carb' and 'low carb success stories', both sides have something useful to offer, at the end of the day only you can work out whats best for you personally.
Are you able to exercise or do some walking? I find that a bit of extra activity does help with my diabetic control.
I am sure that with time you will learn so much more about diabetes and how your body works you will be less scared of diabetes.
Dont worry ahead of things, it usually turns out different to what we imagine anyway and then you find you have been worrying all this time for nothing.
Good luck with it all.