Hi, I was researching the cause of my pain and found your post. It sounds identical to my symptoms, except, I haven't started exercising yet :) Anyway, mine started 4 days ago and I just went to the dr today and an ekg ruled out the heart. Of course he had a "student" in the room and asked her for diagnosis. Words like Heart, liver, gallbladder, pancreas etc. were used and now I'm going crazy looking everything up on the internet. Right now I'm convinced I have Pancreatic cancer! Anyway, I have to go get blood work done tomorrow, it's a start. Did you ever find out anything with the rest of your tests? Hopefully the pain will just go away, that's what I'm hoping for. If you can, email me at ***@**** and let me know your results and if you're feeling any better yet.