...for faith

I consider this an extention to my last post, because it all seems to relate to my inability to stop analyzing ever single aspect of my life.
Before, I applied it to forgiveness and wondered if it was possible to give it without thinking of a reason or an excuse. Now, I'm applying it to my faith in God as a whole.
Is it possible to trust God completely?
For others...yes. I've seen it. For me...I'm not so sure.
I don't know if it resulted from a desire to know or define myself, but at some point I started analyzing every facet of my life, my motives, my relationships, etc. I would tear these things apart, examine every detail untill I could find a reason for it all. So far God has been willing to bless me with understanding for why/how a lot of things have happened, but I fear this has ultimately hurt my relationship with Him. It has prevented me from trusting in Him, to the point where I have to talk myself into fullfilling His will as I know it from studying His Word. I have to outweigh the good and the bad, consider every possible option before I'm finally willing to act on what I know. And if I feel called or led by God to do something I don't understand I panic and try to make a run for it. While I'm running, I convince myself it's just me being an idiot and not really from God, and try to forget it ever happened.
To this I say: ENOUGH!
How can I serve God and witness to others if I let my fears and compulsions rule me? How can I "speak in other tongues" and "heal the sick" if I have to explain it? God exists and works outside my realm of understanding, I need to accept that and just trust Him.
For the two or three people who still read this, please pray that I let go and submit my mind and my understanding to God.