I also have some feelings like the loop you described. After a long time that I didn't know how to stop that loop, I learned to practice breathing, and I noticed it helps me calm down. It sounds that you also have a way to calm down during your loop. Maybe try to find more ways that don't depend on other people, so that you can solve your bad feelings by yourself.

Hi I’m new here 👋 I also have that pulsating feeling in my body like I could feel and hear my whole body beating, it’s so scary to me, I get this ugly sensation like I’m gonna die, but yes deep breathing always helps and of course 🙏 prayer.