question: I am a 22 year old female, sometimes get irregular periods, but lately they have been very normal. I normally get them around the end or beggining of a new month. This month i am experiencing an incredible amount of pain in my lower abdomen and my coccyx. its a sharp burst of pain from my coccyx to lower abdomen. My muscles in my body are also very sore. Is this pre menstural discomfort or do I need to worry?