Hi, I had acid reflux issues in the past. I'm right now covid positive and taking doxycycline. I don't have any fever from past 4 days and my breathing was also normal 3 days before. But from last 3 days, I feel heaviness in chest and have difficulty in breathing especially in the eveningand night. My spo2 levels are at constant 98. I took ranidom-mps and digene yesterday night and I felt good during today's first half. But after lunch, the breathing difficulty and chest tightness is showing again. Need help Thanks