Sounds like it's time for an evaluation by a cardiologist. These are classic anginal symptoms. Speak with a cardiologist and review your options. You could have a
nuclear stress test done to determine if you might have a blockage. Or, you could have an angiogream done to definitively determine artyery blockage. You're at high risk from family disease, but other factors would be
high blood pressure,
smoking or
diabetes. Best to check in with your doctor!