Questions...

Don't bottle up your questions- ask God! But don't question His authority or character. Don't question HIM, but don't hide all your other question from Him. And if you do find yourself questioning Him, it's better to be honest with Him (respectfully) than to let it fester.
Confess. Repent. Worship.

Depression

What causes depression?
Not focusing on GOD.
(Unforgiveness is often a factor in this.)