Hi there ! I was diagnosed type 1 July 31 2018. I take insulin so I can tell you a little about that. It makes a big difference if you are type 1 or type 2. There is an important balance between carbohydrates eaten and insulin injected. If they are not balanced you are in trouble either way. One thing for sure, you will have to change your diet. Christmas may seen like a bad time for that. Sugar and sweets need to be cut out right away. Measure your blood glucose with your meter every couple hours to start. You can drop the frequency of meter usage as you learn about about how food affects your blood sugar. Everyone is different and you have to learn about you. But sugar is bad for everyone. Next cut starches (grain, potatoes of all kinds, rice, pasta bread even the whole grain types). This will lessen your need for insulin. The less insulin you need the better. This is why you have to measure your glucose, especially first thing in the morning, before eating lunch and dinner and 2 hours after the first bite of lunch and dinner. This is the minimum at the start. If you're reading is low have a piece of fruit, wait 15 minutes and measure again. Are you on one kind of insulin or two? Any questions, keep asking.