You cannot remove consequences simply by regretting the choice.

Regret is a feeling about the past, not a lever on it. You can feel the whole weight of a choice and the consequences will proceed on their own schedule, indifferent to how sorry you are. This is why remorse alone leaves people stuck: it costs a great deal and moves nothing.

What does move things is repair, which is specific and often unglamorous. Ask what one concrete action would reduce the ongoing harm, and do that rather than replaying the moment. If nothing can be repaired, the remaining task is to carry it differently: learn the lesson, change the pattern, and stop paying rent on a punishment that helps no one.