What Causes Pain Near The Armpit During Cold Weather?

Hi doctor. I got pneumonia in 2011, which was treated with amoxicillin antibiotic 1000mg. In Jan 2012 the MRI revealed a 10mm hole in my right lung, but no medication or next visit was needed. In August 2013 I was diagnosed with TB and had the 6 months treatment. The reason why I m writing to you is because I have pain in my right back side on the same approx level as my armpit. This happens regularly when its cold and when I m studying for long hours(exams/tests/projects). I don t know if its relevant but I sleep a lot during the holidays or weekends when I don t have classes. The near death experience in 2011 had an impact on my self esteem as well as building relationships around me. I test myself regularly for HIV, which I m negative but dropped below a size 28 jean in 2011 when I had pneumonia. Its 2014 now and I vary from 32 - 34 jean size. Can you please help me, I really fear another relapse. Regards, Vincent