Thanks for your question on Healthcare Magic.
I can understand your concern.
In my opinion, we should first rule out coronary
artery disease (CAD) for your random
chest tightness.
So get done blood pressure monitoring, ecg, 2d echo and
stress test (trade mill test).
If all these are normal then no need to worry for heart diseases.
Sometimes undiagnosed stress and
anxiety can also cause similar symptoms.
So avoid stress and tension, be relax and calm.
Don't worry, you will be alright.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.