Wanna check if any mummy get pregnant while breaatfeeding and no menses yet . Is it harder?

One of my friends did! Though many if our mothers, mils will say taht we cannot get pregnant while breastfeeding. That's not the case. My friend got pregnant even when she wasn't in menses. Many times our body gets fertile even before we start getting periods. Typically, it is normal pregnancy but you have to take care about breastfeeding your baby during pregnancy as you may lose nutrients.