I don't understand anymore

Until now, I'm still unwell. I still experience this like stabbing pain in my left arm, back pain on different spots, burping (not acidic taste though), headache, congestion, nausea, dry throat, jaw pain. I went back to a doctor just recently but it did say to me that it's allergic rhinitis and acid reflux. I'm extremely concern and I don't know what to do anymore. Needed some advice or help. 😭