I know how you feel - have been there myself many times. Hold onto God and know that He will never leave you. He will work all things for good . . . keep praying and remember, "this too shall pass".
[ What is life? It is the flash of a firefly in the night. It is the breath of a buffalo in winter time. It is the little shadow which runs across the grass and loses itself in the sunset. - Crowfoot, 1890, on his deathbed. ]