I'm a bit worried because I've been diabetic for 35 years and have managed it pretty well until now, but recently, I've started experiencing this sinking feeling and episodes of fainting and dizziness. I got an ECG done and it shows some blockage. Could this be related to my diabetes, and what should I do next?

Given your 35-year history of well-managed diabetes, the recent symptoms of sinking feeling, fainting, and dizziness, along with ECG indications of blockage, suggest a potential cardiovascular issue, such as coronary artery disease or cardiac autonomic neuropathy, so consult a cardiologist to discuss further testing, like angiography or stress tests, and develop a plan to address the blockage and manage cardiovascular risk factors.