between the hammer and the anvil
Facing two equally unpleasant, dangerous, or risky alternatives, where the avoidance of one ensures encountering the harm of the other. I was between the hammer and the anvil, for if I didn't take out another loan—and go deeper into debt—I could not pay off the debts I already owed. The police knew with certainty he had drugs in his car, so he became trapped between the hammer and the anvil: either lie to the police, or admit that the drugs belonged to him.