Hello ladies, after 3.5 terrible months with constant nausea and almost daily vomiting I thought I'd share with you my experience in case it helps anybody else. Basically, if you are experiencing vomiting after your 16th week, I would suggest you look for secondary (to the pregnancy) causes, typically related to your stomach. A prolonged period of vomiting can cause stomach issues such as ulcers so if you find yourself in that situation ask your doctor to try to treat the stomach (e.g. with antacids) rather than the vomiting. It worked great for me and I'm finally starting to feel human again!