Trying to hold back the tears

It hurts so much when my little sister (13) keeps saying you need to have a baby I want a little niece or nephew. I know she doesn’t mean to be rude or anything and I’ve told her before that I have a condition same with our fathers sisters but she’s a child and things like this don’t always stick like it would with an adult. Teens her age aren’t really memorizing serious things like this. But each time she says it it makes me want it even more because I’m the oldest and my other siblings are pretty young and not in any hurry to start a family. And I’m ready and have been for a while and it just doesn’t seem to be possible. And to make matters worse I just found out my young cousin who just had her first (daughter) about 4 months ago is pregnant again and is having a boy this time. No waiting or anything just instantly got pregnant right after. And she isn’t working nor is the father. They are on and off and my other cousin (her 14 yr old sister) has been caring for the baby along with their other nieces and nephews from their other sisters who are also very young with multiple back to back children. Having family members who are so young and popping babies out left and right while you struggle just to have one sucks so much. Especially when they don’t care and think it’s cute because of all the attention and picture likes they get for their children. They have family who will take care of them while I’m stable and doing nothing but work overtime to save up towards my goals. Sometimes I just feel like God doesn’t care about me like all the bad things I’ve done in my past are why this isn’t happening for me and like it’ll never happen