Is it normal to feel this way?

is it normal for me to feel like jealous? I don't know if that's how to describe it, it feels like all the 'friends' I do have, have babies. my two closest friends, one has a 3 month old & the other is due December 3rd. I just want my own baby, they keep saying 'oh don't think about it' HOW CAN I NOT THINK ABOUT IT? I want a baby with my SO! I love him more than anything and I listen to them go on and on about how their baby resembles so much of their SO and how their bundle of joy is bringing them so much closer... I'm just bummed I guess. because neither of my close friends planned theirs. and here I am, being careless, taking care of my body, just trying. I know it'll happen when it's meant to, but is it normal for me to feel jealousy/notsomuchhatred/bummed. I love my friends to death and their babies, I know I shouldn't feel this way though.. 🙄