Should Ovral Be Withdrawn While Planning For Pregnancy?

Hi. Yes please. Ive been on the 3 month injection for some time. Ive change to the pill (ovral). Ive also abused drugs some time ago. But am clean for few weeks. And planing to keep it that way. I would realy like to have a baby now. Me and my boyfriend both stop using drugs. What must i do now. Must i leave the pills as well. And is there something we must drink? I dont know how it works. Please help. We realy wana start a family now