Tips and advice?

I'm almost 33 weeks pregnant and getting induced at 38 for blood pressure. I'm almost 400 pounds and the closer I get the more scared I get that I'll have to have a c section.. have any of you been plus size and still delivered vaginally? Anything I can do to increase my chances of vaginal birth? I have a pregnancy ball I just started bouncing on, baby is weighing 4lbs 11oz so she's normal size, everything looks great all except for my blood pressure.. any tips or advice would be appreciated