Is it normal to get your period after stopping birth control and then not having it for a month and half?

On hormonal Birth Control your menstrual cycle is suppressed, as you no longer ovulate you no longer menstruate, instead women get a withdrawal bleed due to the drop in synthetic hormones when going from active to inactive pills or stopping the pills. If you come off hormonal birth control then it can take a few months for your menstrual cycles to return thus it can cause irregular or absent bleeding.