My best friend and sister are both pregnant and I'm hurting

My sister is military was on a mission met a guy who live in a different country for 3 months and he got her pregnant while they were drunk and she wants too keep it and he does not but based on everything he's said I think he's secretly married and now that they are back home he's not talking to her except to say get rid of it. My best friend just got out of a dv relationship and is a lesbian. She randomly hooked up with her guy best friend once and got pregnant. I'm the only one both have have really told and talked to and I'm trying to be supportive but its really disheartening since I've been trying for almost 5 yrs now this will be my sisters 2nd oops I'm pregnant by a terrible guy and don't get me wrong I love my nephew but my sister doesn't take care of him my mom does. And my best friend also has pcos and it happened the first time she's been with a man is yrs by total accident. And I can't even try to get pregnant because I can no longer afford the specialist I was saving for because the company I work for laid everyone who's in my position off for 3 months a few weeks ago and I have to use my savings for bills and I also haven't had a period since June. I love being a aunt and a stepmom but I want my own children and it feels impossible