сложный период(a bad/sticky/difficult/rough/patch phrase: a period of time in your life that is difficult or unpleasant All marriages have their sticky patches. Small businesses are going through a bit of a bad patch just now. MED Alexander Demidov)
переживать сложности(из книги британского автора ..she confessed they were suffering a sticky patch in their relationship – она призналась, что в их отношениях было не всё гладко YuliaO)