Hi 
its true that consumption of alcohol prior to test will have effect in lipid level including 
triglyceride level also 
Regarding your worry about having heart atteck , at present risk factor in your case is 
overweight , dyslipidaemia ( high triglyceride level other 
cholesterol level not mention ) alcohol intake 
you have some risk factor to develop heart atteck in future 
so reduce your weight , limit your alcohol intake , avoid fatty food and fruits like banans , also avoid ice cream , do regular walking.
to know probability of having heart atteck you can calculate by framingham risk score to have heart atteck in future , that will give you probability of developing 
heart attack in future 
to calculate that you need to give some information like age , gender , systolic blood pressure , lipid level , 
smoking history etc. 
take care