I felt a sudden sinking in my belly.

Revyn was no stranger to the sudden sinking feeling in his stomach.

He had missed its builders by ages, and with that realization Bowman felt a sudden sinking of his heart.

He shook his head, feeling a sudden sinking of spirits.

"Surely," she said, with a sudden sinking of heart, "you have not come to take her away?"

There was a sudden sinking of his forces.

Hester felt a sudden, awful sinking in her stomach, as if there were nothing inside her.

There was a sudden sinking in his belly.

Just before taking her seat in the buggy, Rena felt a sudden sinking of the heart.

It was absurd to feel this sudden sinking of disappointment.