Why Didn’t God Answer My Prayer for Guidance?

Questions about why God didn’t answer prayers for guidance regarding a major life decision and whether there’s evidence that God is more likely to say yes to a prayer request made while fasting.

• When facing a major life decision, I prayed daily for guidance and for the Holy Spirit to order my steps, but I didn’t get an answer, and my decision turned out to be the wrong one. Why?
• Is there evidence (biblical or extra-biblical) that God is more likely to say yes to a prayer request made while fasting, and if not, then why fast?