An irregular heartbeat accompanies you when you feel tightness with your upper body, and this experience is stressing, so go through the dhikr and in no way end doing the legal ruqyah if you face it and really feel very awkward. Muslims believe that spiritual beings (Specially the jinn) https://connerjtbks.blazingblog.com/26208944/5-simple-statements-about-powerful-roqya-djinn-explained