駐禁で切符を切られた直後にＵターン禁止でつかまった。運が悪いというか、弱り目に祟り目というか。

It wasn't my lucky day. First, I got a parking ticket and then things went from bad to worse when I got pulled over for making a U-turn.

弱り目に祟り目。

Misfortunes never come singly.

触らぬ神に祟りなし。

Let sleeping dogs lie.