m guessing that the slightly high cholesterol level is a
risk factor, hypertension is indeed a
risk factor, family history of
heart disease is very much a risk factor. You didn't mention, but your exercise pattern, smoking history, BMI, diabetes, dietary habits and stress levels all factor in as well. However, you have three definite risk factors.
I'd suggest you read up on risk factors for heart disease, and work to correct any obvious risks. For example, if you smoke, stop.