Health Crisis

Monday, February 6th I went to the hospital in an ambulance after collapsing from lack of oxygen. Diagnosis was pneumonia but turns out there are complications. I stayed a week and came home Sunday the 12th. Still on oxygen and very weak and shaky. I see the cardiologist on the 16th. Where do we go from here? Probably heart valve replacement. I am apprehensive about my future. Thoughts and prayers are appreciated.