Hello, and I hope I can help you today. Nausea and vomiting is common in the first trimester pregnancy, and if you manage to irritate your stomach or esophagus enough by coughing and retching you can injure yourself which can result in a small amount of bleeding. However, you may have an underlying stomach condition, such as an ulcer or gastritis, which is only now having symptoms because of the pregnancy. Furthermore, if there s any possibility that the blood was actually coming from your lungs rather than your stomach, there are a whole host of other diseases that need to be considered in that case. I strongly recommend if you have not yet seen a doctor for your pregnancy you do so as soon as possible, or even your family doctor could evaluate you at this point. Tests can be done to help determine if the blood is coming from your sputum or from your stomach. In the meantime, things that can help reduce nausea during pregnancy that lead to vomiting are avoiding eating anything that is highly spiced or fatty, eating frequent snacks throughout the day so you are never really hungry, and making sure that you eat something small before you even get out of bed in the morning. Dry starchy things like crackers generally stay down your stomach best when you are nauseous. There are prescription medications that can be given to help you with nausea during pregnancy. However, natural remedies also exist. Ginger, taken in teas, candies, or other forms especially if they are sweet are very soothing to the stomach. The combination of vitamin B6 and over-the-counter sleep aids, like Unisom, are very effective in treating nausea and vomiting a pregnancy. So in summary, severe nausea and vomiting in the first trimester pregnancy are not unusual, however if you are bringing up blood you really do need a medical evaluation urgently. I m not concerned about any risk to the baby, however the bleeding may get worse if you are not treated for the nausea and continue to vomit on a regular basis. I hope that I was adequately able to answer your question today, and that my advice was helpful. Best wishes for the rest of the pregnancy, Dr. Brown