“Heart attack iminent? Anxiety?”

You are ok. First , the blood pressure. 130/80 is the cutoff. It said stage I because of the diastolic of 85. No doctor is going to initiate medical treatment for that minimal increase. You can lower it with diet and exercise. The DASH diet for cardiovascular health and low sodium for hypertension ( high blood pressure). Moderate intensity aerobic exercise for 30 minutes 4-5 times a week. You could benefit from some weight loss. You are overweight but not obese. Ideally your weight would be 170-180 for your height unless you were very muscular)muscle weighs more. But 10 lbs of weight loss can lower bp by 5-10mmhg. And diet and exercise another 5-10mmhg. Your physician can order ambulatory BP monitor to follow bp. If you want to do your own . Check it 3x a week at different times and record the numbers. We as physicians would much rather the healthy control of BP in 19 yo and try to avoid meds. After a few months if bp is still high on 3 mo follow up we could initiate a diuretic like chlorthalidone or amlodipine (vasodilator). But meds have potential side effects. Your bp might be ok on follow up. And stop worrying about it. Ideal bp 120/80 or less . You are not that high at all. Relax. Because stress increases bp. You should adapt a healthy lifestyle regardless of BP for overall health. Good luck

Probably not, but I cannot be sure from your information. A ER could tell for sure.