Hi. I'm 29yrs. I'm not married and virgin. At the age of 13 I attained puberty. From age of 15 I'm experiencing severe period pain. Before 1 week of my periods my PMS will start. I feel very tierd and a day before my period I'll ve some little pain. On 1st day of my period I've severe pain with nausea and vomiting. I couldn't even stand and I can't eat anything. I ve severe pain on my left side. 2nd and 3rd day I ve stomach pain but not severe as 1st day and have back pain. On 4th day my bleeding starts to decrease and On 4th or 5th day I'll ve a severe pain on my right side for about 2 hours with heavy bleeding sometime with clot. And on 6th day my periods stop. Medicines also doesn't help me. I feel little relief with hot packs. What might be the cause for my pain?