I get severe lower abdominal pain , somewhere near the appendix or kidneys or ovaries 10 days before my periods start.

The pain is so severe that i cant sit or stand or walk. It last for around 1 hr and comes frequently throughout the day , probably 5-6 times. So atleast 1/3 or half of the day i am in pain. Its very severe during the nights that i cannot even sleep.Its like someone is pinching with a needle or a knife and the pain radiates to my lower back and till the right foot.

Sometimes have breathing problem too when pain is very severe. This continues for 7-10 days and after 3-4 days my periods starts. This goes on for every month. I had ,many ultrasound scannings , blood tests but nothing is diagnosed and all organs seems to be normal. No abnormality found. The doctors told they dont know about this as all reports are normal. I have been suffering from past 2 years and its seriously affecting my work life. I am seriously looking out for a solution.