I've been feeling a tight, clenched sensation in my chest for the past 2-3 days, like there's a light weight pressing on it. The feeling gets worse when I stand up after sitting for a while, and I also feel a bit breathless along with some anxiety. Its starting to scare me. Last year, I did an ECG and other tests for insurance, and everything seemed fine. Can you suggest who I should consult and what might be causing this?

I understand that this feeling can be quite distressing. It could be related to anxiety, acid reflux, or even a cardiac issue, though your previous tests were normal. I recommend consulting a cardiologist for a thorough check-up and possibly an updated ECG, as well as discussing any anxiety or stress you might be experiencing. Take care!