I am having chest pain since quite some time , it usually comes and goes but it's there's since a week or more now. Yesterday when I went out, I felt a sudden sharp pain in my chest near heart side, it was very sharp and felt like pins and needles. My left arm also pains and back pain is also there Still it's paining ECG is normal, TSH normal, Blood Sugar normal, cholesterol normal. I have taken VITAMIN D tablets and I take dsr capsules empty stomach early morning. What could be the reason?