"If I didn't do" = "If I hadn't done"?

Hi everyone!

Could someone please explain to me if sometimes "If I didn't do" means "If I hadn't done"?

I found it in a video in which the speaker (an indigenous person but with good English, I would say) does everything to help other people as a job. But she had deep emotional wounds before that. And she needed to heal those wounds before starting to help others. At least that's how I understand it because she says about deciding to help others: "I wouldn't have done this if I didn't do my own healing."

Could it be that sometimes people accidentally use wrong grammar when they mean to say "If I had not"?

Thank you for any replies in advance!