Chest Tightness and Mild Pain. Again.

I am having upper back pain & chest tightness wid occasional chest pain for last 7 months. Checked wid cardio Dr in the month of March 22, he asked to do some cardio test like ecg,echo,tmt,chest x ray and lipid profile test. Except BP & borderline cholestrol everything is normal. Dr said lifestyle modification & reduction in weight is enough. Taking prolomet xl 25 ml for BP 2 times a day. Over weighted 108kg & 5.8 feet. After a month went for a 2nd opinion wid another cardio, he checked my old reports & said all are normal only. He asked to take Vit D test,which comes deficiency value of 20.01 ng/ml. Taking D Rise 60K weekly once for 8 weeks, 2 weeks completed. But til now I am facing same issues of upper back pain, chest tightness all de time, mild chest pain comes & goes. Really bcum anxious & depressed. Pls sum1 advice me wat to do further, Whether I have to do any other test or repeat the same test which I did earlier. Yesterday took ecg which was normal again.