know where you are coming from- was in the same boat as you until the day i delivered. I lost 20kg in weight when i was pg with my twins!
ask your Ob to give you a script for Zofran- that is what they would have given you in hospital to stop you throwing up. Its expensive until you reaach the PBS threshold- ask about it
also try actupuncture - works a treat and when i tried it last pg when from throwing up 14 times a day to the day of actupuncture not thorwing up at all- it did come back a little- but after each treatment it slowly went away
HTH and good luck!!!!
odette