welcome to HCM.
You need to get an ultrasound
scan done to rule out any problem in the uterus or ovaries.
If the scan result is within normal limits then you have nothing to worry. The easiest method to overcome this dysmenorrhoea is by trying to bear the pain as far as possible taking antispmodic tablets like cyclopam, only if the pain is unbearable.
If there is endometriosis
or polycystic ovaries
, then it has to be managed by an expert gynecologist.
Wish you all the best.