Advice first soon to be mom

Samantha • 20 years old almost 21 one June 17! And soon to be mommy
I'm a health eater about ten week pregnant ! And I'm worried about the  
 gestational diabetes ! I'm really nervous I'm a healthy person who at time will have a chocolate bar or a small chip bag! My moms parent has diabetes, and so does she! My family doctor told me that my last blood test and urion test came normal that their no suger in my urion or blood !! Is this a good sign so far ! And how can I avoid getting it but still have. Treat at time or how to have them when my boyfriend or mother buy me treat, like a chocolate bar or chips or a candy or even garonla bars 😳 I'm really worried