Control your diabetes and blood pressure meticulously.
Get yourself tested for lipid profile and thyroid.
Get your serum B12,fluid acid,VIT D,calcium,iron levels checked up.
Since you had an MI earlier you must consult a cardiologist
to get an echocardiogram
done to rule out any heart ailment like post MI gradual heart failure
Get your kidney function tests and urine test done to rule out diabetic Nephropathy