I have tightness in chest. Is it start of a heart attack?

Hi doctor,

I am suffering with cold and cough. A week before I had cold, I felt some tightness in my chest that was aching. It was associated with some burning sensation on top of my back and around my shoulder blades. Since I had cold, the condition has got worse and has remained for few days constantly. It is slightly painful and causes discomfort. I get quick sharp pain while stretching or lifting. The pain gets worse when I am standing. I have chest congestion and off late been coughing up yellow phlegm. My chest feels tight when I cough. I have been having neck pain too. I am very much worried and concerned about my heart. I will be flying for a few days so, now it is giving me a huge concern. I would like to know, is it the start of a heart attack? Please help. Thank you in advance.