、。
Because she had faith in God, she had nothing to worry about.
Literal
She [topic-は] God [object-を] was-worshipping [because-ので], nothing worry-things [subject-が] did-not-exist.
信仰する (しんこうする, 'to have faith in, to worship') is the formal verb for religious belief. The ~ので connects cause and effect with a softer, more explanatory tone than から. 心配ごと (しんぱいごと, 'worries, things to worry about') uses the suffix ~ごと ('things of the type'), and 何も~なかった is the 'nothing at all' pattern requiring a negative predicate.