Hi moodygirl..
You've not been diagnosed long, so probably either still in the honeymoon period or just coming out of it... The honeymoon period effect different people in different ways, some find at the during this time their diabetes is easy to control, as the pancreas slowly stops working evenly, others find that it's different because one day the pancreas will work and the next it''s not, so hard to work out insulin needs...
Yes as others said, you got to keep trying but you need how to keep trying as without information that enables you to translate your results and what is impacting on those results, you won't know how to change anything,,,
But here some guidelines to what you need to learn and do to get the information to take control...
First, diary to log in your food/carb amounts, exercise, stress levels, illness, with your blood glucose results, insulin dose in.. The better/more information you have the easier it is to translate your results into control.. You can get meter's where you can log all this information into it's electronic log book, easily and swiftly...
Blood Testing, you need to do this regularly and consistently, before and after eating, before and after exercise, if you feel unwell, stressed etc... this give's you the information different factors changes your insulin response, so that you can alter your dose to keep control..
You also need to learn, where the carbs are hidden in your foods, how different types and combination of carbs impact on your BG, which one hit fast which are ones adsorb slowly..
Sounds a lot of learning, yes it's pretty intensive to start as you gather all your data, but you find once you'll up and running you can drop back on the intensity and ease of the main data collection.. And just have spats of intense data collection when something changes, such as new exercise and change in normal routine or perhaps you feel stressed as hell about something..
So if you ask questions here, we can help out with explaining many different things to help out... And perhaps you might like to invest in a book about MDI control, a good one Is Using Insulin by John Walsh...