Giving up on faith

So, I'm in a ministry. I feel that God has called me to do this full time instead of going to the school i have been trying to go to for three years. So i decided to step out on faith and be a full time evangelist. So last Monday I quit my job at walmart because its necessary to devote all my time to the ministry plus, we would be leaving not too long from now to a different state. And all this week and last week, the devil was really trying me. I wasn't in my bible, i was on the computer and in bed most of the day. I was bored out of my mind. I was having so many doubts in my mind about this whole thing i did and thinking that it was probably a bad idea. I still am but today we finally got word from our pastor. He was out of town trying to get us a grant for the ministry. And we got it! I feel sad for doubting my God and not trusting that he would see us through. I'm still not 100% on if this is what I should be doing, but my faith is growing stronger day by day.