Diagnosed with gad about 9 months ago. I don't take any meds. Today I got 2 pvc's in a row. I also feel chest tightness. Is this related to gad?

GAD. Gad is generalized anxiety disorder. Yes, the symptoms could be related to gad; if they continue to worsen, however, i would recommend seeing your doctor for further evaluation.
GAD? Not sure if you mean CAD (coronary artery disease?). You're very young to have it unless you have diabetes or use cocaine. 2 pvcs in a row is not a good sign but how do you know you had them (no, you can't tell by how it feels). You need to see your doctor and i suspect you already have. Soldier on!