@jb794
Did you have a HYDA scan of your liver/gallbladder/pancreas function? It detects problems causing abdominal symptoms that do not show up in bloodwork or ultrasound.

I had similar symptoms and had a HYDA scan that finally showed my gallbladder was only ejecting 7% bile when it should be a minimum of 35%-40%.

Also, have you seen a cardiologist or vascular specialist to see if you have some blockage causing pressure when you are lying down?

Have you had your spine MRId to see if there is a compressed nerve/nerve root impacting your torso when lying down?