When Will My Period Start When My Period Is 20 Days Late Despite Taking Ethinorm And Meprate?

Hi my period cycle is 32 I have not get my period after 20 days than I go to doctor who prescribed me ethinorm e and p which din not get periods but after taking that I cause lower back pain and some changes in discharge but I didn t get periods after that I consulted another gyne which gave me 5 day meprate after taking it at 4 day I get some blood discharge but after some time it changed into white plz tell my when I get my period my beta hcg test is negative