I changed my mind
How could I say I changed my mind?
He cambiado mi mente o cambié mi mente??
3 Answers
to change one's mind (about something) -> cambiar de opinión (acerca de algo)
Además: cambiar de idea
Cambiaron de idea y decidieron quedarse en casa.
Here they use arrepentirse for to change one's mind, so:
Me arrepintí.
This is used more for changing your mind about having something done or what you want to order in a resaurant rather than changing your opinion about something like the death penalty or the truth of the Riemann hypothesis.