I have been pregnant twice, but unable to carry them to term. I would recommend asking for the anti-nausea medication in a suppository form. It is definitely not the most comfortable form, but at least you won't throw it up. I am so sorry that you have been so sick.
I would definitely file a complaint against the OB/GYN. I filed a complaint against the doctor who answered my miscarriage page. He told me that it was a holiday and if I was going to lose it, I would no matter what so to not worry about it until the holiday weekend was over. And if I did lose it, to "put it in a bag, put it in the refrigerator and bring it in the next day." Evidently I wasn't the only one to complain about him, because he was asked to leave the practice not too long after that.