What Are The Uses And Side Effects Of Norethisterone?

Yes.. thanks.. the last couple of months I have used Norethisterone to delay my period and help with PMT.. this month I only took 2 tablets in total to delay my period.. I had a party to go to.. but the first day of my period i had a terrible bloated feeling.. wind and ovarian pain on the left side.. the ovarian pain comes and goes and varies in how painful it can be.. is it wind? or related to my cycle/ norethisterone?