If you get to the point where you cannot keep any fluids down at all, I highly recommend seeing your doctor asap so you can get some medication
for nausea. Some women develop
Hyperemesis gravidarum which is severe nausea/vomiting during pregnancy. It causes you to become severely dehydrated and rapid weight loss. Like i said, if you cannot hold fluids down AT ALL see ur doc before it gets to the point where u are admitted in the hospital for IV fluids. Take care.