Advice needed please 🥺 New girl here!!

My boyfriend and I have been trying to get pregnant for a few months now and I am 8 days late. The latest I’ve ever been. I took a pregnancy test first thing Tuesday morning and it was negative. It broke my heart. My boyfriend has a daughter of his own who we have majority so I don’t think he feels upset by a negative test like I do and I’m having a hard time accepting that I’m not pregnant. I have started and I’m still just going on without a period. Any advice on what could be going on or just life advice would be appreciated. I am new here as well.