Left upper abdominal pain plus heart palpitations. For the past year, I have been under a lot of stress. About three months ago, I started getting heart palpitations and constant pain in my upper left abdoman. Had a Angio CT scan which indicated the structure of my heart is normal. However, my cardiologist said I had an irregular heart beat. He thinks it may be caused by stress. I am very stressed about the pain in my left upper abdoman. I do not have a fever and I am not nauseaus. However, I burp a lot and sometimes it hurts when I swallow. Also had a EGD and colonoscopy done in October last year; everything was normal; however, doctor said I had nonulcer dypsea. Can you give me advice? I am very concerned abou the upper stomach pain, especially worried about having problems with my pancreas. My grandmother died from pancreatic cancer.