If doc say i have a perception of my pulse in neck because of stress, is it because of higher bp cause of stress or something else stress do?

Not enough info: Stress can cause increased blood pressure. On the other hand, increased blood pressure can lead to a variety of symptoms which, when felt, can lead to stress. So it's very difficult, sometimes, to know which came first. If the metoprolol you list as a medicine was the prescription you are asking about, your doctor may be treating blood pressure. Please ask your doctor directly about this.