I feel awful

Me and my SO have been trying to give our little girl a sibling and I feel like it’s never gonna happen. It been 6 months of trying and I feel bad that I get upset that everyone else (what seems like) is getting pregnant around me. The first couple of month I just went on luck but this last month I did opk and I thought we caught it. My boobs have been sore for the last couple of days and have been progressively feeling more sore. I’ve taken hpt(internet cheapies) the past couple days and they’ve been BFN. I’m supposed to start AF tomorrow or Wednesday but I just have a feeling I’m out already. My periods were always 27 day to the dot and always started in the morning. My last cycle I was 2 days late and got my hopes up and than AF came. I’m gonna be 35 on August 23 and I just wanted to be pregnant by now. Why does it hurt so bad?