I am 41 years old and my cycle has never been regular for more than a year at a time. I have had 2 children and had my tubes tied in 1990 or so. On October 12 I started my period. I was at work and started having some cramps. I took some Tylenol like I normally do, but this time, I started throwing up. It was terrible. I had cramps so bad that I could not even sit at my desk and type. I finally had to go home and was still throwing up about midnight. The next day I mostly stayed in bed. Not much cramping but I was very weak. This month, yesterday, the same thing happened again. This time I threw up on my shirt. What fun. I feel better today, but I'm really worried about this. What can you tell me?