Birth control

Lyndie

I'm getting married in a month and would like to conceive as soon as possible. I miscarried last year and my ovulation and periods have been off since so the doctor recommended BC. My cycles are all over the place I'm a week late again and still waiting for AF. When do I start taking it? I will stop taking it after a few months to conceive but just need to regulate my cycle. Do I wait till after my period? Start taking it now?