You may feel no more than a passing discomfort from your period, or you could be doubled up by it. Usually the pain comes in the cramp like spasm. It could start in the lower abdomen, and may radiate up the spine and down the legs, or center in your lower back. If you get it really badly, you may feel really dizzy or nauseous and get diarrhoea and vomiting. Most women find that the pain comes on a few hours before their periods start and begins to cease once the flow begins. But in few female pain continues into the second and even the third day of their period. Some other symptoms include; fatigue, headache, backache, premenstrual bloated feeling, and occasional diarrhoea.