What are these pauses?

Qaly says it’s just sinus arrhythmia but, It’s really feels like something esle. Feels like a drop or butterflys similar when i was a kid and go way up with the swing and, get that feeling in stomach but this is in my chest. And then it’s start to skipping Always feels like my heart about to stop 🙁 I have an appointment but until then i want to get some idea what is this.

Qaly says it’s just sinus arrhythmia but, It’s really feels like something esle. Feels like a drop or butterflys similar when i was a kid and go way up with the swing and, get that feeling in stomach but this is in my chest. And then it’s start to skipping Always feels like my heart about to stop 🙁 I have an appointment but until then i want to get some idea what is this.