Wow, that's a lot to have gone through, two heart attacks and a triple heart by-pass. I imagine you are on some meds like statins, metformin and more perhaps?
Take it easy as some others have said.
Yes I can see why the advice was to eat less of everything. Doing so you will automatically cut back on carbs (to help with the diabetes) and also fats (which probably contributed to the cholesterol build up and vessel narrowing).
Eating less will continue to bring your weight down steadily, your numbers will continue to improve and reduce, blood glucose, blood pressure, cholesterol all work in concert and will all see significant reduction and improvement.
Do you cook meals or is it mostly takeaways? Do you have someone close, like a relation, nearby to support you? (Sorry for the personal questions).
During my mealtimes I try to
1) eat from smaller plates and saucers
2) half my plate is green leafy and cruciferous steamed veg like kale, broccoli, Brussels sprouts, spinach, cabbage or cauliflower which I eat FIRST,
and
3) drink plenty of water 30mins before a meal and two hours after but rarely with the meal. I also drink lots of water during the day.
I try not to
1) snack on sweets, biscuits, confectionary, ice cream in front of the TV or elsewhere
2) have too many takeaways and I throw away takeaway leaflets
3) miss exercise even walking for ten mins
and
4) be disparaging or demeaning about myself with negative self talk
Get better soon 🙂
P.S hello and welcome!