Best to talk to a doctor. If you have diabetes your blood sugar could be dropping on its own, but it can also be caused by other things, such as consuming too much sugar in your regular diet.

Eating too much sugar can spike your triglyceride levels, this screws with your pancreas, which screws with your body's ability to process sugar, which can lead to diabetes and/or pancreatitis.

There are easy to recognize foods that are high in sugar that aren't difficult to cut out, like desserts or soda, but there are also a lot of kinds of foods that are high in sugar that aren't immediately obvious, such as bread and alcohol. Sugar from fruit is no different, some people get it in their head that it's better because fruit is supposed to be healthy, but it's not.