TTC While Pumping

Hello everyone! My baby will be one in December and I would like to ttc for another baby. I’m not breastfeeding but I am pumping milk 4-5 times a day. My is exclusively taking breastmilk. No formula. I don’t pump at night unless my baby happen to wake up and I’ll pump while she drinks her bottle. But that doesn’t happened every night. Maybe twice a week. I heard two different stories from my friends about ttc while pumping. One friend wasn’t able to get pregnant until 2 years after finishing pumping and the other was able to get pregnant quickly while pumping/breastfeeding. Just curious to hear others experiences 🙂