Negative dua of the oppressed

I recently asked this question but was still confused and wanted a more detailed answer. I read a Hadith that the dua of the person who is wronged is always answered. This made me fearful because I remembered when one of my very close family members said rude and mean things to me I made a negative dua against them. I can’t remember if I made that dua in my heart or out loud. But now I really regret it because I love them a lot and never ever want that dua to come true. So I’m asking if there is a way I can reverse it? Or is having a change of heart enough because Allah SWT knows what’s in the hearts and knows I don’t want that dua to come true.