It a first for me. I finihed my menstruation on 29 bit since the 5 day of my menstruation i had severe pain in my lower back which worsens when im doing my regular chores. I had two days of nausea bt it subsided of a ate. I havent been with any guys since after the 14th of this month. My menses started the 24th bt it was without the normal pms pains nw im havin them afterward. Any idea on what could be wrong. ? Please some advice or insight would help.