Anyone pregnant while breastfeeding

I have been breastfeeding for a year, my first born was An

<a href="https://glowing.com/glow-fertility-program">IVF</a>

baby 💗... and still I haven’t had a period since breastfeeding, I’m wondering how likely it is to fall pregnant while your breastfeeding and had no periods?! Hope this makes sense. My sweet little girl is a nearly 13 months