Relief

A positive emotion stemming from an emotional transition when an uncertain situation turns out for the best or when a negative outcome is avoided.

Reference:
Franklin, J. C.; Lee, K. M.; Hanna, E. K.; Prinstein, M. J. (2013). Feeling Worse to Feel Better: Pain-Offset Relief Simultaneously Stimulates Positive Affect and Reduces Negative Affect. Psychological Science, 24(4), 521–529. https://doi:10.1177/0956797612458805