Hi and welcome to HCM Nausea and vomiting usually begin around the fourth week and usually end by the time you reach your twelfth week. But some may continue through out pregnancy. Follow these instructions: 1.Eat little and often to prevent heartburn and nausea. An empty stomach can increase nausea. Keep blood sugars steady. Try eating small amounts of bland, dry food throughout the day. 2.avoid rich, spicy, acidic or fried foods, and eat less fat in general as they tend to irritate your stomach lining resulting in the production of more gastric acid 3.Do not lie down after a meal. If you move about a bit, you re less likely to throw up the food 4.Try drinking between meals if you re finding it hard to keep fluids down, and limit drinks during meals. Be sure to drink regularly 5.Have a spoon of diluted ginger juice mixed with honey every morning. Ginger is known to settle stomachs and help nausea. However, ginger should be used in moderation and with care – it doesn t help everyone. 6.If iron tablets are aggravating your nausea, discuss the alternatives with your doctor. 7.Vitamin B6 (pyridoxine) or a pregnancy multivitamin may reduce pregnancy sickness and also some drugs like doxinate can control vomiting, but do take this medication under your doctor care You had some blood coming through vomitus, so it is better that you consult your doctor for help. Regards Dr Santosh