come round the bend

Translations
сойти с ума
After working nonstop for three days, I felt like I was going to come round the bend.
После трех дней непрерывной работы я почувствовал, что вот-вот сойду с ума.
Definitions
To 'come round the bend' is an idiom meaning to approach a turning point or to recover from a difficult or confusing situation. It can also mean to become crazy or irrational, as in 'going round the bend.' The exact meaning depends on context.