I guess its not that I don't know what I want.. its that I want everything

Today I made a decision. I turned down a job. A job that I would have been really good at and really enjoyed. Why did I turn it down? I have no idea. I couldn't make a decision and time was running out so I took the safe way out. As I sit here I'm debating whether or not I did the right thing. Everyone advised me... if its what will make you happy do it.. if you really want to do it, do it... the problem is that I don't know what I want to do. Or probably more accurately, I want to do it all. So instead of doing something, I do nothing. I sit and wait and wonder about things. I'm puzzeled. I want to do what God wants me to do, but how do you know when God is speaking to you. I know how God has spoken to me. I can look back and definitely see the hand of God in my life. But in the moment, I listen for his voice and can't hear it. I'm confused and wondering if I'm too scared to actually be the person that God wants me to be, or if He just has bigger things in mind.