@tinyelvis- Welcome to Mayo Clinic Connect. It's just awful to feel heaviness in your chest, and it's often difficult to really tell where it is coming from because everything is so tightly packed together. There are so many things that can cause this and as Colleen has stated we can't give you a diagnosis because we aren't doctors.

If you feel comfortable having an endoscopy and trust your doctor then finding our what he finds, or doesn't, might save you from more guessing and you can rule it out. I also encourage you to read as many posts as possible so that you can get an idea of other's struggles and how they have handled it.

I don't understand what you mean by a low number on your CT scan. I have never heard this term before as related to a problem that was or was not found. Can you explain this? Also, have you seen a cardiologist?