Do You Trust Me?

So I was praying for a friend tonight and her main concern was about really trusting God.  I feel like God is asking me just that question about my money right now.  He's asking, "Do you trust me?"  See he started working this thing about money in me right after Christmas and its been scary at times, but really good.  He took me through a process of letting go and being more generous.  It is ultimately what led me to sell my car and move to the apartment I did.  Its been great fun giving money away and being generous with people.  Now the likelihood of a huge financial commitment has come up recently and left me wondering, "Do I trust him?"  I haven't been purposely saving as aggressively as I had been before Christmas and yet I have more money than I ever have and I feel like that is proof alone that I am approaching my finances the way I need to be.  Yet I feel this voice in my head saying, "If you don't start saving aggressively for this thing you'll be sorry."  Will I?  Don't I have a God that cares enough about me to have intervened so many times to get me to this place?  Will he not take care of this?  Do I trust him?