21 years, 4 ft 11 inchs 8 and half stone: I have really heavy periods and hace been prescribed tranexamic acids however i was also prescribed norethisteron to delay my period as i didn't want it for my holiday. however my period came early so hadn't started the norethisterone and i am worried i am going to have a too heavy period to go on holiday (it really is bad). can i take norethisterone with tranexmic acid to lighten the flow and shorten the length of my period?