32 week growth scan scare

So I had a growth scan today and little man gave me a scare! His heart rate dropped below 120 and the tech told me to wait while she talked to someone about what to do. This sent me into a tailspin I was crying hysterically and couldn’t control myself. The tech came in with the nurse and they told me the doctor wanted me hooked up for a non stress test. It wasn’t too bad but it scared me something awful because I didn’t have anyone there with me. The non stress test wasn’t terrible. Everything ended up fine but it’s just scary. Also when I left the office manager/head nurse stressed that I call the emergency line if anything comes up at all. Which she hasn’t really stressed in the past.