It happened to me before. When I was vomiting and had really bad morning sickness. I had streaks of blood with my vomit. I went to see my doctor but they said it's normal. As sometimes what happens is the lining of the esophagus breaks with the high pressure of vomit coming up towards the esophagus. And it breaks some veins. But anytime you are not comfortable call your doctor.
You need to call your doctor. Asap. I don't want to alarm you but that's not normal. They will probably be able to give you something to make you feel better. I hope you feel better soon! Please call your doctor.