Period but not fertile ?

Tayla🌼 • Two daughters 🌸🌸 13month Gap. 👶🏼 👶🏼 👼 healing from loss 😭 at 11 weeks pregnant. NOW -🌈 👶🏼 on board

Is it possible that you aren’t ovulating even though your period is back ? This is my second period after my c section 15 weeks ago. And it was separated by 30 day exactly ! Could I not be fertile ? I am breast feeding and bottle feeding.