Menstrual cramps are already uncomfortable and annoying enough when they occur during your period. It can be even more frustrating when you start feeling cramps but you know your period is still days away. Having menstruation cramps before period is perfectly normal, but it can also be a sign that something else is happening. Understanding the reasons you might be getting cramps before period will help you find ways of addressing the issue. Though the majority of cramps happen right when your period starts, it is possible to have cramps days before your period. This happens due to a condition called premenstrual syndrome (PMS). PMS occurs due to your body’s changing hormones right before a period. It is often accompanied by symptoms like mood swings, tender breasts, and fatigue. 

Your symptoms suggestive of premenstrual syndeome.PMS is a collection of psychological and somatic symptoms occuring during the luteal phase of cycle and lasts for few days to 2 weeks. Most of the women have mild symptoms and only 5 percent have severe. Most accepted hypothesis is an increased sensitivity to normal fluctuation of Gondal hormones. Serotonin appears to have  a role in the pathogenesis so serotonin enhancing drug like fluoxetine drug reduce your Ppathogenesi.