Level 6 Gestational Diabeties?

This is my second pregnancy, im 33yo and i would say always been slightly overweight. Im not a small person anyway and the little extra weight i carry is spread evenly. My first baby was only 6lbs and i never did the test, I have not really done anything differently this time round but be a little more lazy. I don't excercise as much as i used too. So now im going to get my *** in gear and move it a bit and i just want to know. Have you been in this situation and had a normal birth/baby? I have a fear im now going to be pushed into a Csection (my first was natural). Please let me know your experience so i can stop fretting over this!