I failed my Glucose test Monday?

I failed me Glucose Test Monday and I have to take another test one Friday. The doctor said that if I fail this one I will be Diabetic while pg!!!! I am tiring not to eat anything with a lot of sugar,but it is so HARD!!!!!!!!!!!!!!!!! I tiring to get myself use to it just in case I fail the test again!!! So how do I not listen to my cravings.......... All i had to day with sugar were pop tarts that was at like 9 this morning, but I am now craving chocolate.... How do I not listen to my craving.........I just want to try to stay away from the sugar to b on the safe side just in case I fail it again.... Any advise on how to not listen to my sugar cravings would be great!!!!!1