What do you do when you have prepared carefully, prayed fervently, waited a reasonable time for a response, and still do not feel an answer? You may want to express thanks when that occurs, for it's evidence of His trust. When you're living worthily and your choice is consistent with the Savior's teachings and you need to act, proceed with trust. As you're sensitive to the promptings of the Spirit, one of two things will certainly occur at the appropriate time. Either the stupor of thought will come, indicating an improper choice, or the peace or the burning in the bosom will be felt, confirming that your choice was correct. When you're living righteously and are acting with trust, God will not let you proceed too far without a warning impression if you've made the wrong decision.
Proceed with Trust
Elder Richard G. Scott teaches the importance of proceeding with trust (D&C 9:7-9).