I experience something very similar, around 8-10 days before my period starts. During that tie, I throw up several times as well, and only when the stomach is empty the pain reduces. The doctors say it is gastricitis or oeasophagitis, but then why does it have to happen only during those defined days is beyond me. The rest of the month I am completely fine. This has affected by day to day life; during that time I am unable to sit, stand, sleep or practically do any activity, not even go to work. Nothing comes up in the various medical tests. Have you found a solution to your problem?
for the past 8 months now I've experienced a similar type of pain. About 7-10 days before menstruating, a massive pain will begin in the center of my abdomen--as if I'm in some sort of intestinal distress. Once this pain caused me to throw up. I've begun to recognize the signs of the onslaught of a "pain attack" and immediately swallow 1-2ibuprofen. This generally helps, but if I don't take the ibuprofen soon enough, the following day I'll still be sore. I know this is my uterus--I can feel it clenching. I'm quite sure that I have endometriosis, although no gynecologist has ever said this word to me. In the past, I've had an ovarian cyst, and a fibroid or two. I would consider surgery, but I've been to over 4 different gynecologists in the past 10 years and none of them really seem thoroughly knowledgeable and trustworthy. I am very healthy, and have become increasingly careful about my diet. Western medicine is so ignorant of women's issues. The only brief relief I've experienced is from a Korean "Qi Gong" therapist. Not sure why a $90 Qi Gong therapy treatment can heal me but a $350 gynecologist is utterly useless, offers no explanation and no cure other than removal of my uterus and (why not?) one of my ovaries to go with.
Since last summer I found this website and for the first time I felt I was not alone in the world with these crazy symptoms I suffer every month. I have read many times each case hoping to find and answer to alliviate the severe pain, but I haven't found it here. I have experienced almost all of those symptoms 10 days before my period for 3 years already. I just talked with my doctor last week and he said it may be because of the fybromialgia I have, it worsen the PMS. Hope this diagnosis can help others and talk to your doctor about it. Let me know if you find a way to lessen the pain.
I have the same issues. It wasn't until a pelvic prolapse and lots of research that it's due in part from a tilted uterus. A uterus that titls backward putting pressure on making it hard to "go". Also cause severe gas cramp. Good Lord the things I wish I had known 10 years ago.