I've been having these sudden chills or a cold feeling in my chest while I'm asleep, and it's been happening on and off, like a couple of times a week for the last few months. I already saw a cardiologist and did some tests to make sure it's not heart disease because I'm a 35-year-old guy who was recently told I have hypertension. Can someone help me figure out what might be causing this?

it might be due to stress. start doing exercises, avoid stress