at sea | all at sea
....
A breath of fresh air
....
a drop in the ocean
....
(looking for / seeking) greener pastures
....
can't see the wood for the trees
....
beat around the bush | beat about the bush
....
a voice (crying) in the wilderness
....
When it rains, it pours
....
down to earth
....
The calm before the storm
....
answer the call of nature
....
A storm in the brewing / a storm is brewing
....
can't see the forest for the trees
....
The sky’s the limit
....
a ray of sunshine
....
Dead in the water
....
go with the flow
....