Sorry for late reply and inconvenience.
As you describe possible causes may include Dysmenorrhea,Irritable bowel syndrome,Uterine pathology which can cause you pain in lower abdomen.
So you should take OTC Motrin which provide you relief.
Also do warm compresses on lower abdomen with a heating pad.
Take metamucil and OTC Mylanta.
Hydrate yourself with plenty of fluids.
If your pain'll persist then you need to be seen by your regular doctor for further evaluation and management.
If you have associated dizziness,lightheadedness,excessive heavy bleeding with severe pain then visit ER for prompt management.
I hope this helps.
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