Someone explained why it did not happen: you doubted, you spoke it wrong, you did not believe hard enough. It has stayed with you.
What is usually behind it
Teaching that makes the believer responsible for every outcome, which leaves nowhere to put a bad one
Well-meant advice from people who needed the world to make sense
Content in this market built on exactly that mechanism — if it worked, credit the message; if not, blame the listener
No counterweight: the parts of scripture that say the opposite are rarely quoted
These are common states, not a diagnosis. If something here is affecting your health, your sleep or your safety, please speak to a doctor or a qualified professional where you live.