How To Regularise My Period As I Have Taken Postinor?

HI im 23 years old . i have hormonal problem . i ate Thyrox every day . but i didn't take this pill in april and may month regularly .and now my period is irregular since may . and now im facing some problem which is i feel the period pain in my belly but when i go to check then i see there is some thing like white thing are coming inside the pussy . and very much tensed about it . i have done physical relation with my husband . and then i ate a pill called Postinor . Is it good for me . i dont know but my bf pressure me to eat this pill for not to be pregnant . Now i wanna know that how my period will be regular . please reply me .