Chest Tightness, Pain. The issue.

Hello Doctor's, I have visited cardiologist (Mar 2022) for chest tightness and upper back pain, he askd me to take some test like, ecg, 2d echo, tmt, chest x ray and lipid profile test. Everything comes out normal except borderline cholestrol and BP. Taking bp tablet prolomet xl 25 ml for 2 times a day. Low in Vitamin D3 taking D Rise 60K weekly for 8 weeks, 5 weeks completed. I am having upper back pain and chest tightness with middle sternum pain for all most all the time. Will the previous test is enough or I have to repeat the same test (2d echo and tmt). Bcum very much anxious now a days all the time thinking of heart attack, checking google for all the symptoms. Continously discussing about health issues and symptoms to all. Selfly chkng pulse rate all the time. Don't know why I am not able to convince or compromise myself after negative cardio test reports. Slowly loosing interest in everything. Pls suggest wat and how to proceed further to resolve the issue.