I don't understand!!

Megan💟🌻🎀 • I`m 21 y/o. Army Fiancé We have been together for 5 years. TTC Baby #1
I work at a grocery store and a costumer that can in screaming at her 2 kids (probably around the age of 4&6) and she was pregnant. Her kids continued to yell through out the store they got up to the check stand and the checker asked how she was doing her reply was horrible. She said she was tired of the 2 kids screaming and that being 8 months pregnant doesn't help, and this baby wasn't planned and That she didn't even want it. At that point I walked away. My fiancé and I have been trying for 8 months now and I thought for sure that this was my month well AF showed up today. I was devastated💔 and I couldn't believe that she said that. I just don't understand why people that don't want a baby get blessed with one and all of us that try so hard to conceive get heart broken each month when AF decides to come. I think ready to stop trying. I don't know if I can do this anymore💔😭😭