my best friend keeps accidentally getting pregnant

mr

she got pregnant when we had just finished high school by her on again, off again boyfriend (which ultimately turned into just off). Then she got pregnant WITH TWINS by a guy she was just FWBs with. Now she’s pregnant with her fourth kid on her third baby daddy. I feel sad for her that she keeps having all of these kids by men who don’t want to be a family with her. I feel sad that i’m having so much trouble getting pregnant by my man and she’s getting pregnant every year. She provides for her children and is a great mother. and it’s her uterus so if she wants to keep having kids that’s on her. But i’m just like “sis, HOW”. Is it bad that I feel this way? is this still jealousy? are these negative feelings to have? i don’t want to harbor any negativity. it just seems like people with the most unstable situations get pregnant the easiest. 🤦🏾‍♀️ i know her fertility has nothing to do with mine. when i was pregnant with my daughter she was pregnant with the twins. i’ve been trying for months and she’s getting pregnant on accident. why does that make me feel bad about myself when it has nothing to do with me?