I experienced severe pain every time I had my periods. I am experiencing pain during the first day of my period. The pain usually takes three to four hours. But when I have tablet Mefenamic acid, the pain only lasts for one to two hours, but sometimes the medicine does not work. I had a consultation with a doctor, and she told me to do an ultrasound test to see if I had endometriosis, but the test came back negative. One of my friends recommended that I try continuous pill-taking to stop my period so I would not have the pain anymore because that is what other doctors recommended. Is it also a good option for my situation? Please help.