Girls, good night! I wanted to ask if there was a chance of pregnancy,…

Girls, good night! I wanted to ask if there was a chance of pregnancy, like "interrupted" ?, maybe not, I'm unsure. I have breastfeeding, no periods and none after childbirth. Now when do I need to take a test for conception? And what percentage is there that I can get pregnant, specifically with breastfeeding and without periods? Thank you ✨