Chest pain and trouble in breathing.

I am suffering from hypertension ... So I started started walking from last 3 months and 5 days a week..I walk 7 Kms per day .. I always suffer from chest pain which comes and goes .. but from last 5 days ..my chest pain is not going .. it's paining in my left chest .and from same day .. I feel shortness of breadth ..mild head pain and cough  previously in December .. I had gone through ecg and chest x-rays ,lipid profile .. blood urea ,sugar ..all were normal ... I am obessed so I started decreasing my weight from 115 to 102 in 4 months .my height is 165....When I walk my mild chest pain goes and doesn't feel shortness of breadth but while walking my chest pain decreases to 10 % but it doesn't rules out fully ... Due to lockdown I can't go anywhere .. i am having fear of any heart related issue .. sometimes that pain radiates to shoulder and back also ..