Confused with my diagnosis

Hi everyone! Recently i have been having chest discomfort and it’s really bothering me

I really need help because I have tried having 2d echo and ecg as well as chest x-ray and all came out normal.

I get shortness of breath, some pain and discomfort in my upper chest but when I breath i feel perfectly fine

I can’t quite point where the discomfort is but mostly in my upper chest.

When I’m laying down i feel scared and feels like I can’t breath properly. I can’t sleep not even in shortnaps

Tried consulting the doctor and they said it’s might be LPR

I don’t have other symptoms other than chest discomfort. I don’t really know what test should I do or if this is really a cause for anxiety or LPR or even costochindritis as when I press my ribs it somehow painful but I don