My lo is 18 mos and I'm pregnant due in September. I'm just getting sad as I enter my 3rd trimester…

My lo is 18 mos and I'm pregnant due in September. I'm just getting sad as I enter my 3rd trimester because these months are the last I have with my baby girl and the new baby is just another my little brother won't get to know. And my kids won't get to know him. I wish the world wasn't so greedy and would've left my brother with me instead of taking him away. He only got to know my daughter for 6 months and she won't even remember it. Ugh, idk I'm so hormonal. And the year anniversary of his death just makes it worse.