I started my period on aug 14 on august 27 I started to have pelvic pain that is sharp and dull that?s consistent at night when I am getting ready for bed I never had this happen to me my period is regular I don?t take any medication I am 30 years old my significant other told me to masturbate while they at work so I did and once I had orgasm I began to have period like cramps in middle uterus went away in few seconds but pelvic pain persist.