There are 3 parts to BG control
meds
exercise
food
the only info you gave us was your on insulin
fast insulin needs to match the carbohydrates you eat, too little insulin and you have high BG. too much insulin and you risk going low.
the more you eat the more insulin you need.
same with basal insulin too much you are low, too little you are high
It would help if you gave us more information to work with.
What type of doctor, an Endo?
When do you test and what are the results?
When was and what was your last A1c?
What kind/type of exercise?
Do you break sweat for 60 minutes?
Do you exercise daily?
Are you at normal body weight?
Give us an idea of what you eat.