<s>[INST] I have been experiencing an array of symptoms for some while now but especially severly in the last three weeks. I have face and jaw tightness, chest aches and upper back aches. I sometimes get fluttery feelings in my legs. I have had an ECG and no problems were detected. Does anyone have any idea what might be wrong? [/INST] Thanks for your question on Chat Doctor. I can understand your concern.You're all symptoms are more suggestive of arrhythmia. ECG can be normal in arrhythmia (rhythm disturbances in heart). So normal ECG can not rule out heart diseases in your case. So get done 2d echo and Holder monitoring (24 hours continuous recording of ECG). If both these are normal then no need to worry about arrhythmia or other heart diseases. Sometimes undiagnosed stress and anxiety can also cause similar symptoms. So avoid stress and tension, be relaxed and calm. You may need anxiolytic Chat Doctor. Don't worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>