Long, long before you and I were born, God already had a plan for us. For each of us. Sometimes, when I stop to contemplate that, it gives me goosebumps. He knew me even before I was formed in the womb. That makes me feel special. But does it make me sound self-absorbed? I mean, He was busy creating universes and planets and animals and a bazillion people - did He really have time to develop a plan for my life, my purpose?
At the risk of committing heresy, I believe that God's plans for us are remarkably similar. We are to obey Him, worship Him, love Him, and love others. Deuteronomy 10:12 says "Now, Israel, what does the your God require of you except to revere him, to obey all his commandments, to love him, to serve him with all your mind and being," Jesus reinforced that by telling his disciples " Matthew 22:36-40)
How we do that is what makes our plans unique. Not everybody is meant to be a missionary in some third world country. But everyone has talents and gifts that are meant to be used to serve God and serve others.
If you're still asking God what His plan is for you, perhaps you're making it too complicated. Instead of expecting some grand and glorious revelation, maybe you should be following the Great Commandment and then asking God how you can use your gifts to serve Him.