Discharge or mens?

I gave birth last november 11 2020 after ko nanganak syempre may blood na lumalabas sakin mga almost 2weeks din tas naging brown discharge hanggang sa naging white discharge nalang then kanina napansin ko lang dugo nanaman mens naba to ? Another question pa pala na inject ako ng contraceptive last dec 2 kailan ba safe makipag do kay mister ? And may possibility ba na mabuntis ako kahit may contraceptive ? Thankyou sa response ☺️ #1stimemom 🙋‍♀️ #advicepls