Hello everyone. I'm a 24 year old female. I have normal blood pressure and don't have diabetes or any known heart related issues. For the past 3 weeks I've been experiencing off and on chest pain and the left side and tightness. The tightness feels like there is a rubber band around my chest on my rib area. And I also get pain in my back and center of my abdomen and some mornings wake up with my heart racing at over 100bpm. I've gone to the ER twice in the last two weeks and both times they did an EKG, blood test, and chest x Ray and said everything was normal and diagnosed me with musculoskeletal chest wall pain. Well it isn't going away and now for the past few days I've been somewhat having difficulty breathing, not shortness of breath just feels like I can't breath as deeply as usual and I feel extremely fatigued, tired and dizzy. I know I'm young and they said everything is fine but I'm really nervous that I might be having a heart attack in the near future and I'm scaring myself (reading symptoms online sure doesn't help). Has anyone else experienced anything like this? I don't know if it's anxiety or if I really should get it checked out again. My primary physician is sending me to a cardiologist but it might be a few weeks so I just needed some advice. Thank you!