Is Meditation to relax shirk or haram?

Once I meditated with a YouTube video where a woman told me to relax with breathing exercises, but my intention was only to try it out and relax. I did not pray to the universe or say something like “ommm” like the Buddhists do. I tried to relax by shutting down some parts of my body (nervous system). Did I commit shirk? I already repented to Allah Subhanahu wa ta'ala and I'm frustrated that he won’t forgive me if it’s a sin.