Missbec i am absolutley horrified that a medical professional could be so rude and arogant. I am with everyone else you need to make a complaint so that this doctor does not continue doing this to other overweight ladies it is bad enough that he has done it to you. I would also request that you don't see the dr and find out when he will be in the clinic and try not to book an appointment for those days.
As for being overweight while pregnant that is me. I was way above my BMI with my sons pregnancy and yes i got GD but other than that all went fine. He was a natural birth weighted 8pd 11oz (little big but not huge) but i was treated with respect. As for my first pregnancy with my daughter i had preclampsia towards the end but that was also due to the stress of her father leaving me 4 weeks before she was due. Again she was a natural birth and there were no other complications through the pregnancy. With my son i gained 4 kilos and with my daughter i gained 5 kilos but after the birth i lost about 11 kilos with my daughter and lost 15kilos with my son. As long as you eat right and look after yourself no matter what size you are there is always chances of complications and yes the chances are higher when you are overwwight but there is also support out there that will help you get through you pregnancy if complications arise.
Take care of yourself and your precious unborn baby and complain about the doctor.
Goodluck