Perhaps God accepted the elation as part of the thanks.
She thanked God for giving Tommy what he wanted so much--herself.

Ah, she had thanked Him for that before, but she did it again.

And then she went on her knees by her dear doctor's chair, and prayed that she might be a good wife to Tommy.
When she rose the blood was not surging through her veins.

Instead of a passion of joy it was a beautiful calm that possessed her, and on noticing this she regarded herself with sudden suspicion, as we put our ear to a watch to see if it has stopped.

She found that she was still going, but no longer either fast or slow, and she saw what had happened: her old serene self had come back to her.