Is It Safe And Effective To Take 2 Gynecosid Tablets To Prevent Pregnancy After A Missed Period Following Intercourse Post-miscarriage?

I had miscarriage of 8 months on 8th March. Had normal delivery baby was expired inside my body. But on 30th March I had intercourse with husband. Now Today Its 19th April. I jad no periods. Is taking 2 tablets of Gynaecoasid is safe and effective? As we both are not ready for baby . Please answer me honestly.