What Does Tightness In The Chest And Inflamed Throat Indicate?

In the beginning sept 14th I got an acute case of bronchitis. The dr gave me a 4 day course of oral prednisone along with a 7 day antibiotic. A few days later I went to Europe for 3 weeks. I was sick the entire time and took a second course of antibiotics. On my return I was still sick. I felt a tightness in my chest and my throat was inflamed. I was always tired. I went bk to dr who gave me a breathing test and a chest X-ray. X-ray seemed ok. Put me on another 4 day course of prednisone and a tri pac antibiotic. It’s now 7 days past and I still have the same symptoms. I take a drug called imuran for ulcerative colitis. I’m on this drug for 10 years. I know it’s tough on my immune system but my internet’s says I must stay on it. Going to a pulmonary dr next week. Your thoughts?