When I sleep, I have pressure below the center of my chest and it takes my breath away so much it hurts. If I am sitting down, it goes away.

It is recommended that you see a doctor for your symptoms. It is important to undergo a thorough medical examination to determine the cause of your discomfort. A doctor may recommend additional tests such as an X-ray to further investigate the issue. Seeking medical advice and getting a proper diagnosis is essential in addressing your symptoms and finding appropriate treatment.