There was a point in my life where I began to question my faith. As I slowly delved into looking for answers, I found that most of them amounted to "you just need to have faith". On the other hand, I could see that science could answer plenty of things about the world and life, and if it couldn't, then at least it gave an honest "we don't know right now". It took a little while to set in and accept this, but I became an atheist after that. And though being faithless might sound horrible, I can say that I am far happier now then I was before.
"Faith" is meant to be tested. It's strength is measured by it's endurance regardless of the ever changing circumstances. Do note that faith isn't just believing something or someone. Faith is two parts and requires trust as well. Active reliance. I can believe Delta flights are safe, statistics show it, but I don't trust them enough personally to actively put myself on one of their flights. And where there is lack of trust, there is obviously a host of doubts and where there is doubt there is 'fear of something'.
Have I ever questioned my faith (ie. the existence of the God that I call 'Father' who forgave my shortcomings through Jesus)? No, because I've had personal experiences and been exposed to people who have trusted in God and prospered in their entire life. Have I question my faith (fulness) (ie. my trusting confidence in that God)? Yes, more times than I'd like to admit. That's what testing will do. But the more I come to know my faith, the less of a struggle my faithfulness has when it is tested.
Nice to see a thought provoking question like this. Take care and I hope we'll both come to rely more on our maker.
Also, do you ever feel that when some very bad shit happens to you, that your faith is being tested?