Will Norethisterone Also Serve To Treat Irregular Period?

hi, off to Thailand on 5th feb, im 47, after always having regular, easy periods, over the last 12 months they have got irregular, and my last one, ending today lasted 9 days with bright red blood ( not heavy). Would like to miss one if poss, off on a holiday of a life time, and concerned. googled norethisterone, not concerned about the messing with time bon my cycle on my return, just side effects whilst away, mainly bloating, nausea??