Vomiting blood during periods is one of the signs of pre menstrual syndrome. Other signs include breast tenderness, fever, fatigue, dizziness, edema, body aches, cankers, headaches and emotional disorders. Changes in diet and aerobic exercise can help you. Don't take any NSAID pain killers. Nutritional supplement like Vitamin B6, calcium, magnesium are also recommended. You should discuss this with your doctor.
You need to go see the doctor immediately I've never heard of that.
It is Parenchymal endometriosis. You need to see a gyno who has actually heard of them because most of them have not. I have this disease.
Honestly this problem is a new one for me. Please see your Doctor. This coughing up blood may not be directly related to your periods. Blood from the lowere torso which has its own enclosed passageway should have no effect on what comes via your mouth. When this occurs again visit your Doctor as it is happening. He will probably want a chest x ray and complete blood count. Anytime you see blood from the mouth and you don't have a nose bleed or bleeding gums, take that red flag to the Doctor quick!