Avoid all sugar, especially soda, candy & cookies. No syrup, jelly, cake, fruit juice, doughnuts, frosted flakes, honey, watch the fruit, etc...
If you don't eat, your blood sugar will go down. Meat, eggs, nuts & cheese will keep it low too.
Eat small balanced meals.
The range for normal blood sugar is 70-110.
You don't say if you are treating your diabetes w/ insulin or oral meds or anything else - The best rule of thumb is..if you are symptomatic -thirsty, hungry, los of urination, sweaty, shaky, nauseous....check your sugar, take meds if needed and prescribed and recheck in 30 min to 1 hr. For now chill -ask your Dr. tomorrow if he wants you to go to ER and when...