BFN πŸ˜₯πŸ˜₯ 12dpo... 😒πŸ˜ͺ

So today I was anxious to test, 12dpo AF due 12/4.. Took a test this afternoon but it said negative... 4 years of ttc with husband, what are we doing wrong or what are we not doing. I have 2 children from previous relationship, but my husband and I cant seem to achieve conception. Any advice, I would love to hear your ttc stories.