You say, "Hear my prayer, O LORD; let my cry come to you!" (Psalm 102:1)
God says, "do not fear, for I am with you; do not be dismayed, for I am your God. I will strengthen you and help you; I will uphold you with my righteous right hand." (Isaiah 41:10)
God is ALWAYS there to strengthen you, but I do think faith getting "shaken" at times is only human. After all, you aren't, nor will you ever be, God! I believe we need to allow ourselves some grace during these most difficult storms and use the opportunity to seek God even more fervently.
If your faith is never shaken, then how can it grow? A "`shaken" faith is liable to happen on occasion, BUT you will survive it. "Losing" your faith, on the other hand, you can NEVER allow to happen, because that you can not survive.
Remember, God is with you, always, and that whatever it is you're going through right now "will" pass.
"the Lord is faithful, and he will strengthen you and protect you from the evil one." (2 Thessalonians 3:3)