Can Smoking And Being Overweight Be Related To Chest Pain?

I am 37 female non smoker slightly overweight (70) kgs. My mother has high cholesterol and my dad had a heart attack at 68. My diet has been not the best and I havent been exericising has much as I should apart from walking up my stairs frequently. In the past week I have had episodes of chest pain mainly in the upper centre part of the chest. Its feels like a muscle pulling or someone digging their finger into my chest. Sometimes I get a sensation of my windpipe tightening up especially after climbing the stairs and it feels like I am struggling to get a full breath even. Rest usually relieves the pain along with paracetomol but sometimes I get this pain when I am lying or sitting down. strangely the pain goes away if I move or walk around. I have been to the hospital 3 times in the past week. First time I went they said I not having heart trouble and ecg was normal along the cardiac bloods. 2 and 3 time I went I had abnormal ecgs. first ecg said I had t wave inversion widespread and the 2nd ecg showed t wave inversion in lead 111. was sent home on with reasurance that it is not my heart and was told I was low risk for heart disease. I am seeing a cardiologist in a few weeks but the waiting that long is driving me crazy. what is my risk for heart disease.