Hi there. Well, that does sound bad. Vomiting is a reaction to serious pain I've had myself but that has been things like childbirth or a traumatic injury . . . not my monthly cycle! Is this new? I did pass a simple cyst once which was very painful in terms of cramping and pains during my cycle. I have cramps now that are painful but not to the extreme of throwing up. Does ibuprofen help? This is a good cure for menstrual pain. So, I think it would be wise to see your doctor and describe this pain and get their recommendation. Sounds outside of normal. good luck
If your vomiting from pain probably time to see a doctor