Some of us believe that it is the purpose of this life to be tested. Making it through something that you didn't know you could handle makes you stronger. God allows us to be tested because it improves us, and helps us to become more like Him. This life wasn't meant to be a cake walk all the time. Where faith comes in is in trusting that God will not allow us to be tested beyond what we can handle, and that He knows our limits. So you can make it through your challenges because you won't be given more than what you can do.