your sugar is higher than desired, but not alarmingly so.
The most important thing will be to get levels down to ideal as soon as possible.
For now, and until you get on meds to control your sugar levels, avoid all added sugars, and carbs (grains, fruit, starchy vegetables), except non-starchy vegetables (ie. you will be eating mostly meat and vegetables, eggs, cheese etc). You may find that eating low carb is the best way to control your sugars, even after you are on meds. Drink plenty of water.
Most likely you will be put on insulin. This is the standard practice with diabetes in pregnancy. Lots of ladies here are very experienced in managing diabetes in pregnancy, and you can ask all the questions you need.
Don’t worry about the past. Just move forward and do what you need to do now.